Ban Ji-eum tem o dom da reencarnação eterna. Quando a vida de número 18 acaba cedo demais, ela dedica a próxima a encontrar seu grande amor de infância, hoje um homem.

Yusuke Serizawa works at a law office. When he gets into a car accident, a woman helps him. She looks familiar to him, but he doesn't remember who she is. This event triggers a look back at his past romances.