* Mimi and Fei search for old items stored in the upstairs room to see if there are any items they can reuse. Because there are items that they cannot find in market. Mimi saw the chessboard on the table, which was her grandfather's favorite chessboard and always played it with Lexi and Wan. female members like them don't like to play chess, but they know how to play chess. She touched chess with a sense of nostalgia for the old memories her grandfather always told her to clean chess every weekend. The ringing of the phone downstairs prompted Mimi to drop chess and run to pick up the phone. Because there are only Mimi and Fei in the house, while others, Fei tells them to pick the apples growing in the garden near the house to make apple pie.
* On the street near the traditional drink store, a group of old men gather to play chess, each of them skillfully playing chess. But they can't beat Daisuki, the son of the drink store owner. They know well that the drinks store owner's son is a boy who won the national chess tournament this year. After the old men had played chess, they began to rest and invited Daisuke to join drinking with them. Suddenly, a man dressed as a noble walks into the drink store and calls Daisuke to play chess with him. He dropped the bag of gold on the table as a bet if he lost, but if he won he wouldn't take the money. Daisuke heard of conditions that he has nothing to lose and he believes in his ability and needs money to expand the store, so he decides to play chess with a stranger.
* Daisuke started to feel very difficult to breathe and dry his throat because he didn't expect his opponent to be much better than him, and as he braced himself and continued to march with his knight chess, he was tricked by his partner. His failures circled all the way to the end of the road, even if he kept walking he was still lost. This time, Daisuke was so embarrassed that it was the first time he had lost to his opponent in such a short time. The strange man smirked and went on to say, "I don't need the money as promised, but I need your life." Daisuke heard this he ran away from his store but the stranger, who was sitting still, used his finger to flip the black chess piece through the window struck in the middle of Daisuke's back head, causing the Daisuke died immediately in the water wheel in front of his store. everyone in the store saw it was a surprise and try to escape from the OG monster. But the black blood group that was lurking near the store came out and killed everyone in the store. the OG monster picked up the black chess piece that had shot Daisuke, swallowed it, and walked away.
* Police Sen and Ayaka arrived at the scene after the owner's store reported the murder of his son and guests after they returned from a liquor store in his warehouse. Sen police examined the victim's body and thought he might have been shot dead, but when he saw the bodies of other guests cruelly dead, he realized that it was not a normal theft, but black blood group work. The owner cried, pulled an open white blanket that covered his son to look at his son's face for the last time before officers picked up his corpses at the police station for further investigation. After picking all the apples they needed, Lexi and Wan brought the baskets of apples home with Jin and Lin walking in front of them. Lexi and Wan are still exhausted from the picked apples, but Mimi told them they had a mission to do at a traditional drink store where the victim was killed by a black-blooded terrorist.
* When they got to the traditional drink store, they saw that the police were picking up the corpses of the victims, whose control inside the store noticed a number of black chess missing on the board, on the board seemed have a strong punch on it, causing the chessboard to separate into two pieces. After talking to the owner, they both rushed to the police station to examine the victim's body. Sen took them to an autopsy of the owner's son, and Wan went to examine the victim's head, which had a puncture wound, probably the size of a chess hole, and Wan concluded that the piece chess was missing and it's the weapon that kills the victim. After collecting the clues, they went to another area, which was full of chess players, and where Grandpa had taken them before. Because they think the monster must have played chess with the victim before he dying.
* When they got to the playground, a group of young men are chess players, watching a nobleman playing chess with an old man. while Wan and Lexi, standing near the old man. They both admire the noble man whose playing chess game has the best skill. after the old man lost, the nobleman who was his opponent shot the chess at the old man's throat and shot the other chess at another man who watched him play in their eyes. Lexi and Wan both managed to escape from chess that shots on them. Suddenly a group of black blood appeared and attacked them as well. Wan drew his sword, quickly killing the black blood with his one breath. On the other hand, Lexi's punch to the ground made big tremors, caused the black blood group to explode in the air, and he would jump to knock them down, causing them severe internal injuries. The OG monster flipped its finger, causing the world to change scene. they were standing in the sky, above the top of the mountain, and Lexi sitting on top of the pillar of the clouds and the lightning around him kept him from escaping, and the monster OG was sitting in front of him.
* And in front of them is a chess board with Japanese-style Shogi chess, unlike the Chinese chess, which they had just watched when the OG monster was playing with an old man. Between the pillars of their seats, there was a large chessboard that Wan represented on the king's chessboard, and those who were wounded and killed by OG monster became another Lexi's chess pieces. The OG Monster Chess Pieces are members of the Black Blood Team that Wan and Lexi fought with them. And there is a demonic clone spirit of the OG monster, the king on the chessboard like Wan. Therefore, Lexi and wan can't do anything just by playing chess with the OG monster. Once Lexi's chess were captured by a monster, Lexi was wounded in the body like a sword cut by an OG monster's chess soldiers on Lexi's chess piece. As Lexi's chess was about to run out of chess boards, he imagined he was playing with his grandfather, who had been told to calm down and learn to use chess tricks skill.
* Lexi started moving chess like he used to play with his grandfather, causing him to defeat the OG Monster at the last minute with Wan raising his sword to cut the OG Monster King chess. The OG monster had bloody wounds around its neck like its king's chess. He was so angry that he used his hands to crush the board in front of him, causing Wan's chessboard to shake. Lexi, when the lightning around him was shattered he opened his monster eyes, his hair turned white, he drew the blue fire energy on his arm to strike the monster OG, with Wan using his sword to cut under the OG monster's belly. The OG monster was badly injured, throwing a black chess piece which he swallowed to the side and hurled it up into the air towards a large chess piece to grab everything like an electric magnet. The object it absorbed was reduced to ashes. Wan, who was forcibly pulled from the chess piece, but his hand is grabbed by Lexi and on the other hand by Lexi clinging to the pillar. Lexi screamed, releasing the energy thrown wan at the OG monster. then wan use the moonlight sword to kill the monster. The OG monster was cut in half by Wan, and the black chess ball in the air exploded. After completing the mission, Lexi returned home to play chessboard with Wan, where the member girls sat watching them quietly from behind. They both won the match tied. when Lexi looked at Mimi who was sleeping on a chair, he went over to kiss her on the cheek and took her into the bedroom, causing their team to look at them jealously.