29 February

Ji-yeon, who works at a toll booth, becomes terrified when a mysterious black car pays its toll with a ticket stained with blood at the stroke of midnight. Her anxiety grows when her coworker, Jong-sook, reveals that 12 years ago, a vehicle transporting prisoners crashed nearby, resulting in the deaths of all the inmates, with some bodies mysteriously vanishing. Since then, a murder has occurred near the tollgate every leap year on February 29th. Strange incidents start happening more often, often involving a double of Ji-yeon. When Jong-sook is murdered on the ominous February 29th, Ji-yeon, aided by two detectives, begins her own investigation into the unsettling events.