The drama is a melodrama which depicts the story of a man called Kang Ma Roo who has been hurt by a woman he loves called Han Jae Hee and how he continues his own life by using several women. He sacrificed his well being for his girlfriend only to be dumped by her for another man. Then, he sets off to take revenge on her with the help of his best friend. He approaches Seo Eun Gi, the daughter of the chaebol group executive who lost her memory in order to execute his revenge.
E1
Medical Student Kang Ma Roo takes the blame for a murder he did not commit and is sentenced to five years of imprisonment. Once released, he is a changed man and starts to use ladies for his own benefit.
E2
Han Jae Hee's plan to extricate Kang Ma Roo from her life is backfiring.
E3
Seo Eun Gi feels unusually indebted to Kang Ma Roo when he is risking his life for a precious item of her. Though she does not understand Ma roo at all, she becomes very curious about him.
E4
When Seo Eun Gi introduces Kang Ma Roo as her boyfriend, her father makes a decision which will put his wife Han Jae Hee against his own daughter.
E5
Ma Roo travels to Eun Gi in Japan to support her quest to save the Aomori resort, while Jae Hee tries her best to break their relationship.
E6
Han Jae Hee reserves the bar in which Kang Ma Roo is working all for herself, while Seo Eun Gi is being kicked out by her father. Though Kang Ma Roo warns Eun Gi for himself, she is totally in love with him.
E7
Eun Gi is devastated once she discovers Ma Roo and Jae Hee's their past. Meanwhile Jae Hee is making a bold move to get rid of Ma Roo once and for all.
E8
The tables turn now that Chairman Seo has discovered of Jae Hee's duplicity. Jae Hee scrambles to recover from the shocking blow.
E9
Han Jae Hee confronts Seo Jung Gyu with his fraud scheme to save her heritage, which triggers several unexpected tragedies.
E10
Jae Hee brings up a plan to dismiss Eun Gi from Tae San, while Eun Gi remembers Kang Ma Roo after suffering memory loss due to the car accident.
E11
Jae Hee creates a plan to revoke Eun Gi from her current position, while Ma Roo hides Eun Gi from Jae Hee for her own safety.
E12
The return of Eun Gi to Tae San surprises many and causes havoc to Jae Hee's plan, while Ma Roo makes it even more worse.
E13
Han Jae Hee frames Kang Ma Roo for giving important documents to a competitor, while Eun Gi slowly starts to remember more things which are not in favour of Ma Roo.
E14
Ma Roo's patience is tested once he is trying to open up Eun Gi. During a meeting, Eun Gi falls into a trap set up by Jae Hee.
E15
Ma Ru tells Eun Gi to remember him, while he is being framed by Ahn Min Young (without the knowledge of Han Jae Hee) for beating a CEO.
E16
Eun Gi slowly starts to memorize more details about Ma Roo, which is unaware of it.
E17
Having recovered her memory, Eun Gi tests those are around her, unable to trust anyone, including Ma Roo.
E18
Eun Gi has difficulties to forget Ma Roo, while Ma Roo asks Jae Hee to leave everything behind and run away with him.
E19
Park Joon Ha's sudden accident reaffirms Eun Gi's determination to get to the bottom of the conspiracy behind her father's scandal.
E20
Ma Roo is hospitalized after neglecting his brain damage, while Eun Gi is feeling desperate when she hears about it.