It’s 1980s California, and everyone is dreaming of the endless summer. For the Merrick siblings, this idyllic vision is their reality, as they travel up and down the coast with their parents in a van year-round, surfing and swimming their days away. But when a photographer secretly snaps a stunning photo of the family with their boards in the sand, and the image ripples across the country, the only life they’ve ever known is put at risk. Decades after, the now-distant siblings gather on a gorgeous, wild island to honor their late father. But their reunion is complicated when a journalist, eager for the truth behind the famous photo, discovers their identity and tracks them down. As the siblings reckon with the possibility that more of their lives could be shared, a revelation about their past forces them to confront long-held heartaches.

In the summer of 1979, Jackie Pierce spent three months of infinite freedom at her bohemian uncle’s sprawling estate on the California coast. She and her cousin Willa fell into a fast friendship…until the summer abruptly ended in tragedy, and Willa silently slipped away into the night. Twenty years later, Jackie unexpectedly inherits The Sandcastle and returns there to ready it for sale. It turns out that before her estranged aunt’s death, she had promised an up-and-coming producer he could record a tribute album to her late uncle at the property’s studio. When a piece of the past resurfaces and sparks new questions about Willa’s disappearance, Jackie must discover if the dark secret she’s kept ever since is even the truth at all.

Becc was the good girl. Until a secret affair with the charming Cal one summer in college cost her everything she held dear. Now, Becc’s past is back front and center as she travels up the scenic California coast to a wedding --- with a man she hasn’t seen in a decade. As each mile flies by, Becc can’t help but feel the thrilling push and pull of memories, from infinite nights at beach bonfires and lavish boat parties to secret movie sessions. But the man beside her is not so eager to recreate history. And as the events of that heartbreaking summer come into view, Becc must decide if those dazzling hours they once shared are worth fighting for or if they’re lost forever.

Laura and Casey were once inseparable: as they floated on their backs in the sunlit lake and teamed up for the wild scavenger hunts in their small California lakeside town. Until one summer night, when a shocking betrayal sent Laura running through the pines, down the dock and into a new life, leaving Casey and a first love in her wake. But after 17 years away, Laura is pulled home and into a reunion with Casey she can’t resist --- one last scavenger hunt. With a twist: this time, the list of clues leads to the settings of their most cherished summer memories. But just as the game brings Laura and Casey back together, the clues unravel a stunning secret that threatens to tear them apart.