Greed and class discrimination threaten the newly formed symbiotic relationship between the wealthy Park family and the destitute Kim clan.

Small-town girl Deokee is abandoned by university professor Hak-kyu after a lusty affair, and vengefully approaches him 8 years later when he starts suffering from blindness.

The door of time opens between the swordsman who wants to seize the legendary divine sword at the end of the Goryeo Dynasty and those who chase after an alien prisoner imprisoned in a human body in 2022.

11-year-old Dong-ku, who is retarded, is the school's water boy until, that is, the school installed a water purifier system. Disappointed, Dong-ku soon learns the school's baseball team needs a water boy and so he decides to join the team.