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.

Min-goo and Eun-jeong meet at the playground and become close. The two of them go on a treasure hunt with Eun-jung's suggestion. They discover something.

While his girlfriend is away on a trip, retired assassin Bang Ui-kang is tasked with looking after her friend's 17-year-old daughter. After a street attack, Bang Ui-kang becomes embroiled in a murder investigation and dangerous trafficking gang.

Se-jin was once a famous pro golfer. One day, Se-jin’s older co-worker died because his drunk driving. He loses his voice because of this car accident and goes to an island in order to take a rest. And this encounter starts to change Se-jin and people of this island.