Geu Roo and Jin Tae are both special kids who have to get used to new circumstances due to sudden changes in their lives. Sang Goo and Jo Ha both have boxer backgrounds. They are both cold and rude at first but change while they are learning to take care of someone else besides themselves.

People are getting possessed by evil spirits and there is a main evil spirit who controls the others. Exorcism is an important part of the drama.