Three petty officers have returned from Korea on the battle cruiser, and disembark for long awaited shore leave in California. Skip and Joe have no money due to losses in a crap game, but their shipmate Francis "Moby" Dickerson has $300 he won in poker. Skip and Joe have constantly taken advantage of Moby throughout their cruise and once again beg some money off him. Moby wishes to spend his leave on Santa Catalina but his shipmates take an unwilling Moby to an off-limits clip joint bar where bargirls and a bartender drug and rob them of all their money. Waking up broke and guilty but wiser, Joe is determined to get Moby to Santa Catalina by using his scheming ability. Joe arranges their passage and $5 each in exchange for Moby working on the ship. Skip meets dancer Gay Knight where an impromptu dance session earns them some more money that entertained passengers throw at them. Gay takes them to her trailer park where the three have enough money for two of them to rent a cabin; Moby has to sneak in at night and sleep at the floor. Skip arranges more money and meals for a second day by having Moby work as a waiter in a night club. Moby meets Nancy, the daughter of the trailer park owner, when she hits him in the head with a horseshoe, but Skip later sweeps her off her feet and takes her for his own girl. After entering the wrong cabin and unsuccessfully hiding from the two women living there, Moby becomes further dejected when he feels out of place accompanying his shipmates and their girlfriends to the beach. The unwanted Moby decides to return to the mainland. Having to wait half an hour for the next ship, Moby's luck changes when he meets Jane, whose motorboat is not working. In fixing the engine, Moby is thrown in the water. Jane takes Moby to her father's yacht where his uniform can dry out. She invites Moby to a party and her father, the Commodore, invites Moby to sail with them to the mainland. On the way to the party Jane's boat fails again with both Moby and Jane being thrown into the water as the boat comesto life and motors off without them. Moby gets his confidence back by saving Jane, who cannot swim, and using his navigation skills to get them back to safety in Avalon. Jane's grateful father throws a party for Moby where he turns the tables on his scheming shipmates when the sheriff, who had arrested Joe and Skip, turn them over to Moby where he has them fanning him and Jane in the manner of servants.
