Brook was very astute, setting the time for eight o'clock in the evening.
Evenings were disadvantageous for Mu Zisu—firstly, due to unfamiliarity with the terrain, and secondly, he had to go to the island alone.
Mu Yingchen had flown here from C City as soon as Mu Zisu confirmed Na Xiaoxiao's and the others' location.
Su Yanqin also brought people to meet with Mu Zisu. Despite the substantial numbers, they couldn't accompany Mu Zisu to the island.
Huo En was a great help too—he found someone familiar with those waters to lead the way for Mu Zisu. Afterwards, they all hid on the nearest small island, with all systems set up and ready to facilitate the rescue operation.
In fact, sending Mu Zisu alone was tantamount to sending him to his death, but with Xiaoxiao there, Mu Zisu would surely go, regardless of the risk to his life. He'd do it even if it was just to catch a glimpse of her.