A passionate love story between a stepmother and her son. Yoshio lives with his stepmother Ellen in the house while his husband is away. He admires his mother's voluptuous breasts and gentle smile and indulges in fantasies every day. Ellen, too, is left with a lonely body and her feelings for her son grow stronger. One night, Ellen witnesses Yoshio comforting himself alone in her son's study room, fantasizing about his mother. And what will become of their feelings?