The departure of his girlfriend Mina (Chrissie Chau) made Ade (Alex Fong), who was originally a dull person, even more taciturn. His friends could not bear his self-degradation, so they led Ade into a new world called "flash play". After several pleasant and exciting flash play activities, Ade gradually became addicted. The beautiful woman Xiaoqing (Zhang Xinyu) he met during the activities attracted Ade's attention and made Ade unable to extricate himself. One day, Xiaoqing organized a flash play activity of "wild tour in the lake". Ade and his friends Dafei (Li Wei), Rubber (Hong Tianming), Axe (Zou Shaoguan) and others joined in. However, this activity, which should have been full of joy, turned into a tragedy with four deaths and one injury. The only survivor fell into a coma, and the truth lurked in his mind.