Cha Gang Jin is the son of a barmaid, Cha Cheon Hui. His life is difficult as he gets into fights and has to watch other people push his mother around, yet he can't do anything to stop it. He met Han Ji Wan when they were teens, but they weren't able to continue their relationship as Ji Wan ran away. He meets Ji Wan 8 years later, when he's attending her engagement ceremony to Park Tae Jun. However, he is heartbroken as Ji Wan pretends not to remember him at all.
(Source: DramaWiki)
