When Liang Xia's obsession for a perfect wedding puts a strain in the relationship with her fiancé, he ultimately calls it quits and breaks up with her. In a heartbroken state, Liang Xia carelessly ingests a magical item, which transports the 28-year-old’s mind back to when she was only seventeen years old.

Office worker Truly Lin goes on a journey through her memories. 20 years ago, she had a crush on the most popular guy in school. Taiyu, a ruffian and a bully, is in love with the campus belle. Truly teams up with Taiyu to tear the golden couple apart and help each other to get the ones they love.

Учень старшої школи Дон-хьон одного разу падає з даху на чоловіка, який проходив повз, Пан-су, учасника злочинної організації. Коли герої приходять до тями в лікарні, то виявляють, що вони помінялися тілами.

A bullied teenage girl forms an unlikely friendship with a mysterious young man who protects her from her assailants, while she copes with the pressures of her final examinations.