After finding lip gloss in Tae-oh's jacket and a strand of dyed hair on his scarf, Sun-woo suspects her husband of having an affair and tries to find the truth.

Sun-woo suffers from the betrayal of Tae-oh and her friends, and Da-kyung provokes Sun-woo while Sun-woo examines her.

Tae-oh finds out about Da-kyung's pregnancy and is more frustrated with the situation, and during the funeral service Sun-woo's at, she hears the song Tae-oh played when proposing to her coming from the parking lot.

While Sun-woo secretly prepares for a divorce, Je-hyuk expresses his feelings for her, and Sun-woo breaks out a secret about Da-kyung and Tae-oh at the dinner with Da-kyung's family.

Tae-oh is restless about Sun-woo acting differently with him. Ye-rim becomes suspicious of Je-hyuk and Sun-woo's relationship. Yoon-ki, a new psychiatrist, joins the hospital.

Sun-woo and Tae-oh blame each other for breaking the family apart while battling over divorce papers and for custody of Lee Joon-young.