While rowing out in the ocean, Mitch rescues an underwater photographer, named Linda, floating on some wreckage. Linda's somewhat disjointed, frantic story about something attacking her in an underwater cave which killed her partner and destroyed her boat is misconstructed by Kay Morgan, an ambitious, publicity seeking newspaper reporter, who creates a media frenzy by starting rumors about a "creature in the bay." Harvey Miller, the new lifeguard and prankster, benefits from the events by selling undersea creature T-shirts. Meanwhile, Shauni rescues a young girl from drowning and soon becomes compelled to rescue the girl, her brother and their mother from the life they live in the slums of South-Central L.A., much to Eddie's chagrin. While Shauni deals with her possessive father who disapproves of her lifeguard job, Mitch also pressures Captain Thorp to ask for funding for new advanced motorboats, called Scarabs, for the team.。1936年3月的上海,国民党军特种营营长汤敬武在日租界处决了作恶的日本浪人日军士兵,其正义之举遭到严厉处置。他率部杀出重围,以第一次“破腹”行动绝处逢生。日军多次收买无果决定将其剿灭。汤团突破重围投奔新四军,第二次“破腹”成功。中共苏中军区司令员束宇交给汤团一项“假投敌”的特殊任务,以粉碎日军大扫荡阴谋,于是,汤团踏上了第三次“破腹”的征途。汤团几近以假乱真的“投敌”诚意终于得日军高层的认可,一千人马名正言顺地插到了敌人的心脏里。潜伏87天后,汤团终于打响了第三次“破腹”行动的战斗。战斗胜利了,遗撼的是汤敬武还没来得及填好中共党员登记表,就因负重伤不治而永远地闭上了双眼。。