Growing up, Miller, Olly, and Ash were inseparable, sharing a secret bond. They moved to LA, started a record label, and found success. Olly and Miller fell in love, but things changed when Miller spent a night with Ash, leading to their marriage. Returning to Wonderland, Miller feels lost, wearing tinted sunglasses so often she forgets the world isn’t green. Ash is having an affair, and Olly’s career is over. As they reunite in Wonderland over a hot summer, they grapple with their past and uncertain future, while Miller's son, his best friend, and the girl next door navigate their own evolving relationships.