Pil is about to lose the love of his life to a stranger, Jae Hyun and stumbles upon a time-traveling manhole.

Pil realizes he’s gone back in time to his school days. He takes the chance and fights Soo Jin’s first kiss.

Pil’s new past has changed everything but Soo Jin’s wedding. He’s now a thug, and Soo Jin gets kidnapped.

Given another chance to change the past, Bong Pil tries to remember what happened at the beach and how he can use that to his advantage

Back in the present again, Bong Pil is devastated to learn that things are still not back to normal and now he has a new obstacle to overcome

Soo Jin learns Seok Tae has been possessed by Pil's spirit. Doctors say Pil may not make it through the night.