Jang Byeong-tae is a small and weak boy living in Onyang in South Chungcheong Province. He's at the bottom of the school's social ladder and when he transfers to the neighboring Buyeo Agricultural High School, he faces an unexpected incident that becomes a turning point in his life.

Ban Ji-eum can endlessly reincarnate. But when her 18th life gets cut short, she dedicates the next one to finding her now grown-up childhood love.

Childhood enemies Seok Ji-won (man) and Yoon Ji-won (woman), born the same day with the same name, reunite 18 years later. Their families' rivalry fuels their clashes, making them troublemakers who fight at every chance.

Choi Jin Hyeok's daughter comes home covered in blood, suspected of killing a friend. Another child goes missing, tensions rise as family and friends accuse each other.