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.

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