When a Man Falls in Love

Tae-sang Han is a mid-level gang boss who seems to be fed up with his notorious lifestyle. While the gang harasses a bookstore owner to collect debt, Tae-sang notices the owner's daughter, a young college student named Mi-do Seo.

Tae-sang Han now runs Golden Tree, the nation's largest loan company. While Tae-sang treats Seong-ju to a birthday dinner, he spots Mi-do Seo working as a waitress in an Italian restaurant.

Tae-sang asks Mi-do to live a comfortable life with him. He sends her on a business trip to Guam where she meets Jae-hee, Chang-hee's younger brother.

After Jae-hee spends time with Mi-do in Guam, he begins to fall in love with her. Meanwhile, Tae-sang visits Mi-do's family and begins to build a relationship with her.

Chang-hee is released from prison and reunites with his younger brother, Jae-hee. Mi-do is reminded of the horrific past incidents and begins to avoid Tae-sang.

Jae-hee begins working at Golden Tree as the director of Mi-do's department. Tae-sang buys matching rings for him and Mi-do.