On the last day of summer vacation, Lehai and his friends gathered in their secret base. This is an unusual summer, because two deaths occurred one after another not long ago, and both were related to their favorite river. The rumors kept them away from the river and each other. When they finally reunite, they decide to do something they've never done before. So they blocked the river under the railway bridge, and then went to explore the mountains full of ghost legends. The whole story is a teenager's adventure. They finally encountered a monster, fought with it, and finally killed it.
Concept: Whether it is monsters outside or fear inside, the weapons to defeat them are courage and friendship.