A soldier returning home from battle joins forces with villagers seeking justice after their families are brutally slain.

During a sunny holiday, a sightseeing cruise ship heading to "Happiness Island" encountered a shipwreck. Only Ning Yu, Zhang Xinchen and several survivors were washed up on an isolated island without coordinates or signals. Soon, they realized that this quiet island was not a refuge, and there was a strange atmosphere everywhere. Ning Yu, A Qiang and others went to find water. In a huge stone cave, they found two dried corpses and an old red notebook. That night, A Qiang looked pale and muttered to himself as if he was possessed. And the red notebook recorded the unprecedented horror that these survivors were about to face.