Seb is sad. Betty, a horse from the neighboring farm moved away. Princess and Snowy try to cheer him, but nothing works. Snowy decides Seb needs an adventure. The three plan to escape to the seaside. There, Seb can swim in the ocean (a dream of his), Princess (the horse who believes she's a cat) can catch fish, and Snowy can get some inspiration for his book. But can they outsmart the barn's new security system? And can they make it to the sea before Tony discovers they are gone?