When twelve-year-olds Kat Steiner and Blake O'Neill meet at Camp Chickawah, they have an instant connection. But everything falls apart when they learn they re not just best friends - they're also half-sisters. Fifteen years later when their father dies suddenly, Kat and Blake discover he's left them a joint inheritance: the family beach house. Blake needs to sell the house for money but Kat refuses to part with the home of so many happy memories. Although at odds, both must come together to renovate the house and come to grips with their shared past.