Six high schoolers stuck in a murderous time loop must find the scattered remains of an unknown victim to break the curse and finally see another day.

The summer of his freshman year, Hodaka runs away to bustling, ever-raining Tokyo and falls for Hina, a girl who seems able to manipulate the weather.

In 1920, when Korea is under Japanese rule the Korean Independence Army’s Hae-chul and his subordinates are carrying out the operation to deliver funds to the Korean Provisional Government in Shanghai. During the operation Hae-chul is reunited with Jang-ha, a young squad commander, whose mission is to defend Samdunja. They unite and trap the Japanese soldiers in Samdunja, soundly defeating them. Now they’re chased by Japanese troops and Hae-chul finds out that Jang-ha’s mission isn’t over yet. A crucial yet dangerous task is still assigned to him.