Synopsis：This film follows water conservancy expert Shen Tianyi and his classmate Xin Yuanhang as they confront a bizarre incident involving "corpses moving against the current" while tackling the Yellow River flood crisis in Gumu Village. Along the way, they unexpectedly rescue their former companion Yu Yin. The group works together to uncover the truth behind the mysterious occurrences on the river. Amid a web of puzzles, Shen Tianyi and the others gradually analyze and unravel the mysteries, eventually discovering a scientific method to control the floods and restore peace to Gumu Village.