Koo Ji-hye

A paragliding mishap drops a South Korean heiress in North Korea -- and into the life of an army officer, who decides he will help her hide.

Children who live in hiding with superpowers, along with their parents who live with painful secrets of the past, face enormous dangers together.

Ae-ran, a mother who is proud with her son hears a shocking news that her son, Dohoon, who left the military has developed schizophrenia. Afraid of losing her perfect daily life, Ae-ran decided to hide his son's illness. But her secret life that seemed to be smooth started to change when Kyeong-hwa, the only person who knows her secret appeared, gradually turning her anxiety into madness.