In their twenties, Lee Kyeong-do and Seo Ji-woo part ways after two passionate relationships. A decade later, they meet again as a reporter who covers an adultery scandal and the wife of the man at the center of that scandal. Reuniting in their late thirties, their youth has passed, but their love remains vivid. Kyeong-do now strives to prove to her and to himself that he still loves her.

Mangchi is a young boy with few problems and an easy disposition. Living on a building in the middle of the sea, he flies around on his little flying bike looking for adventures and longs for the day when he's finally an adult. So, when a princess named Poplar is being chased by two fighter planes, he rescues her. Little does he know that he will be pulled away from the city he has lived all his life, and dragged by Poplar into an adventure smack dab in between two countries at war and the evil plans of Moonk, usurper to Poplar's throne, who seeks world domination.

A group of friends on a trek in a dark forest begin to die one by one.