Katrina's mistress is called away suddenly. Katrina's friend, Joe, invites her to go to the beach the following day. The next day Joe calls and is surprised to find out that Katrina does not intend to go, as she has no pretty clothes. Joe talks to her and suggests a plan. Shortly after she meets Joe. He does not recognize her, as she is now a blonde with beautiful clothes. They arrive at the beach and decide to go in swimming. On her way to the bath house, Katrina meets two handsome young men who flirt with her. This immediately arouses jealousy in Joe. He tips the bath house attendant and instructs him to lock the two men in the houses. Katrina soon appears in her bathing suit and is the center of attraction on the beach. Joe, raging with jealousy, buys a knife and a bomb and immediately things begin to happen.
—Moving Picture World synopsis