Junior Lifeguards basic training isn't for wimps. 13-year-old aspiring actress Selena Diaz learns this the hard way during her first week on the squad. Along with best pals Jenna, Piper, and Ziggy, Selena is just getting her feet wet as a lifeguard trainee and the going is tough. What's worse, she's also dealing with a new job, swim lessons, a show-tunes singing math tutor, and a haughty neighbor who's also kind of her boss. But Selena uses her showbiz enthusiasm to tackle every problem, and squad cutie Hayden Jones and stray kitten Oscar brighten each day. Meanwhile, they soon discover that a real Hollywood star is shining brightly in their midst—right here on the Cape!