A seemingly harmless small plastic film reel leads surveillance expert Tom Wells to an increasingly dark and terrifying path of no return.With the help of the experienced street Max, he persistently tracks a series of bizarre clues in an attempt to uncover the mystery of a stranger's fate.As the investigation gradually deepened, Tom's work evolved into an unexciting obsession. The distance between him and his wife and family became farther and farther. The life of a private detective in the once peaceful town seemed to gradually sink into the abyss of memory.