Folklorist Shen Wei returned to his hometown to investigate the customs of people fishing for corpses from the Yellow River, but found that the entire village was shrouded in strange folk taboos. With the appearance of an unknown female corpse wearing a red wedding dress, villagers died mysteriously one after another, and mysterious fish scale patterns appeared on each of the deceased. Shen Wei discovered that all the deaths pointed to a tragedy of the "River God Marriage" that was covered up thirty years ago. And he himself has an unexpected connection with this old case...