Jang-seon was a promising gymnast in high school until he became entangled in school corruption, leading to his downfall. He now lives in his hometown, working as a delivery driver. One day, Jang-seon delivers a suspicious package. That night, he discovers that everyone who received the package that day committed suicide using the item. Framed as the main culprit behind the serial suicides, Jang-seon finds himself increasingly consumed by a curse of death.