Troublemaker Dae-ho and model student Eun-bi are complete opposites. One stormy day, a mysterious lightning strike causes them to switch bodies. Forced to live each other's lives, they stumble through school, family, and friendships, gradually discovering sides of one another they had never understood before.

Jung Jun
as Kang Dae-ho

Kim So-yeon
as Ko Eun-bi

Lee Kyung-young
as Mad dog

Lee Seung-yun
as Teacher

Kwon Hae-hyo
as Vice-boss

Im Hyun-sik
as Dae-ho's father

Park Won-sook
as Dae-ho's mother

Yu In-chon
as Eun-bi's father

Park Jung-soo
as Eun-bi’s mother

Kim Min-jong
as I-ho