The widower Choi is impotent. He adopts the infants Mun and Su Ryun and raises them. Mun graduates from college in Seoul but he can’t adjust to Seoul life so he returns to Choi’s home. Mun learns that Su Ryun is not his sister in blood and he falls in love with her. When Choi discovers Mun and Su Ryun meeting secretly, he forces Mun back to Seoul. Mun meets the dancerSuk on his way and returns home. Since Mun is at home, Choi sends Su Ryun away. Su Ryun is unable to forget her home so she returns home on a day that is raining cats and dogs.
