Joo Eun and Tae Hoon are married and they have a 6-year-old daughter named Hee Soo. As working parents, they are busy, but enjoy happy times together. Their world suddenly changes when Hee Soo dies in a car accident. Joo Eun and Tae Hoon experience tremendous grief over their loss. With the help of VR program developer Joon Bum, Joo Eun and Tae Hoon meet Hee Soo again through virtual reality.

Ae Ran, a mother who is proud of her son, hears the shocking news that Do Hoon, her son who left the military, has developed schizophrenia. Afraid of losing her perfect daily life, Ae Ran decides to hide her son's illness. Ae Ran's secret life seems to be smooth but starts to change when Kyeong Hwa, the only person who knows her secret, appears, gradually turning her anxiety into madness.

In a shabby neighbourhood where serial murders are disguised as lonely deaths occur, an elderly priest who hears the confession of a criminal and a middle-aged female detective work together to find and chase down the culprit.