"Eun Hae-il" grew up without being able to forget the boy he had a crush on. That year, after retaking the exam four times, he finally got into the school he wanted. After rescuing a child from drowning in the sea, he loses his strength and falls to his death. Before he stopped breathing, he closed his eyes, thinking of a boy he missed, but when he opened them again, he was inside the bus, not the sea. The boy he loves, "Yoon Pado", appears in front of him, a boy who has survived death and crossed time. Did God really give him a chance?