Twelve year old Remy loves SeaGate, the island where her grandmother had a house and where her family spends every summer vacation. But this year's different. Her grandmother passed away and so did her grandmother's dog, Danish, who Remy felt a special connection to. The usual SeaGate traditions don't feel the same -- and neither does her relationship with her two best friends, Mabel and Bennett. Mabel's family is moving to SeaGate year-round and she's spending more time with year-round kids. Bennett's doing "boy stuff" with new kid Calvin and his snobby sister Claire. Remy takes comfort in the company of the Dog Beach -- which is where she hatches her plan to bring her friends closer and recapture the SeaGate magic.