After a motorcycle crash leaves gang youth Tiger in a vegetative state, his soul slips into the Underworld, where a grim fate awaits: being forced back into his paralyzed body within seven days. Desperate for escape, he turns to Nana—an experienced proxy in the realm of the dead—and becomes entangled in TAG, a system of spiritual substitution orchestrated by the enigmatic medium Uncle Guang. As the missions grow increasingly brutal, buried truths emerge: Uncle Guang is twisting faith to orchestrate murder, and Nana is, in fact, Tiger’s long-lost mother. Caught between truth and kinship, Tiger makes his choice—to return to the living world, expose the conspiracy, and reclaim a life of his own.