A married couple who received a divorce settlement lose their memories in an accident. With amnesia, they fall in love again, so their families try to restore their memories to finalize the divorce.

A clumsy high-school girl - Oh Ha-ni - is at the bottom of her class, and she has had a crush on a popular genius, Baek Seung-Jo, ever since she first laid eyes on him.

A woman attempting to reboot her life returns to Korea and becomes entangled with her childhood friend — with whom she shares a complicated history.