After few years
Everything was fine. The Friends were successful in killing zombies and they also got reward for that.
But...
They were still thinking where the one friends has gone. They always try to find them but can't find him .
One day ,they started walking around the laboratory where this all has started . There were nothing so they decided to go but suddenly they heard some noise coming from grasses,they walk there and found the dead body of there . It was his friend who died due to sunlight .
They started crying and found a letter there. They try to read but failed because it was a strange language. They put that in his pocket and dig his friend in the ground.
At the evening
They go to the laboratory and told scientist about that language. Scientist told them that it is a language of zombies which the scientist has learned now .The friends give the scientist the letter which they get from their friend's body.
The Scientist read that letter and he got shocked and scared. The friends ask them what's the matter?. The Scientist replied that it says we will come back with some different plan. The friend were shocked and didn't tell anyone about it.
After some days nothing has happened they ignored the letter and his friend.
After few years
As they ignored it for many year people started getting missing.Every day many people went missing the friends were scared.
However, they get a letter from sky which says , "We'll come with a team".The friends were shocked .
One day The weather was getting worse the sun has gone and there were a scream which says We'll come. People see that that many zombies comes and started biting people. The friend go to their room and started taking guns as fast as they can. They started killing
Zombies but it was not able to kill .They move people to a safe place and ran to laboratory.
Scientist were waiting for the friends. Friends came told scientist to give them a machine that can deafeat zombies. The Scientist said that they were making a machine from those past years which can deafeat zombies .
They takes the machine and go to zombies and started killing them . It worked they started killing them until they saw there friend who gets bitten by zombies. They can't kill him that's why they caught him and stitch rope to him .All the zombies were deafeated.
They go to laboratory and Scientist make the chemical which turn zombies to human and the friend become human again but he was so strange and always wanted to tell something to them.