When Sid sets off on her annual summer holiday to the Shipwreck Coast, she's desperate for some familiarity after a year of unwanted change. Two weeks with her best friend, Lou, is exactly what she needs. They can continue their search for the millions of dollars' worth of riches that disappeared in a tragic shipwreck over a hundred years ago. But Lou has brought along her popular new school friend, Hailey, who's more interested in boys than treasure hunting. So while Lou is busy chasing Hailey's approval, Sid is left scrambling to catch up, wondering when everything changed. Can Sid protect her heart from getting shipwrecked, too?