As Ma-ru gets closer to Eun-gi, his guilt grows. Jae-hee, now scared of losing her status, plots against them both. In a pivotal scene, Eun-gi discovers Ma-ru’s original revenge plan right before a tragic car accident.

Eun-gi survives but loses her memory of the recent past—including her entire relationship with Ma-ru. She remembers hating him but not loving him.

But Ma-ru, now suffering from a brain condition that causes his own memories to fade, doesn’t always recognize her. The final episodes are heartbreaking: she has to fall in love with him again and again, reminding him who he is.

Enter Seo Eun-gi (Moon Chae-won). She’s the cold, brilliant, and lonely heiress to Taesan Group. Her stepmother? Han Jae-hee, the very woman who destroyed Ma-ru’s life.

But Jae-hee, driven by greed, betrays him. She frames Ma-ru for a violent assault he didn’t commit, then abandons him to marry a rich, powerful chairman. Ma-ru goes to prison for her crime.