Astrid can't remember the best day of her life: yesterday. A traumatic car accident erases Astrid's memories of September 9th, the day she spent with an oddly charming stranger named Theo. Ever since, she's haunted by surreal dreams and an urgent sense that she's forgotten something important. One night, she gets a mysterious call from Oliver, who knows more about her than he should and claims he can help her remember. She accepts his help, even...