On New Year's Eve in 1999, Atsushi Horiom (Tsuyoshi Domoto) was in a gloomy mood. He failed to find a job and had a serious conflict with his father at home. He ran to the cinema to watch an old movie called "Lost Forest". Suddenly, he felt a sharp pain in his chest and fell to the ground and died of a sudden heart attack. The dead Atsushi traveled back to high school. After confirming everything around him, he realized that his time had come. Using the known knowledge of the future, Atsushi made a lot of money by betting on horses, saved his suicidal friend, was admitted to a top-notch prestigious school, and became a world-renowned genius. On New Year's Eve in 1999, Atsushi's heart attack occurred again at the same time. When he woke up, he returned to 1995 and began a repetitive life.