With the help of Sol-hee, Do-ha stops covering his face with a mask outside. Their feelings for each other grow stronger as they go through challenges together. Just when everything seems perfect, Sol-hee runs into her mother while working for one of her clients, and someone comes to see Deuk-chan to ask about Do-ha.

Whenever Do-ha denies that he committed murder, Sol-hee can hear that it is a lie. It breaks her heart as she believed he is the only person who does not lie about anything, yet he told her the worst lie of all. Meanwhile, Deuk-chan wants Do-ha to move out of the apartment and stay away from Sol-hee now that she finds out about Seung-ju.