For Olivia Sullivan, the summer of 2024 was the beginning of the end. Political upheaval and natural disasters were bad enough, but danger arrives on her doorstep, threatening her triplet daughters, Olivia finds herself scrolling doomsday-prepping forums for hours determined to protect her family from the coming apocalypse. Olivia’s husband and friends insist she is being irrational, until she is swept away in a flash flood that devastated LA. At least that’s the story her daughters, Rosie, Bettie, and Cassie, were always told. Twenty years later, the triplets discover a box of their mother’s belongings that calls into question everything their father told them about their mother and her death. Reeling from this betrayal, the family returns to California, determined to uncover Olivia’s true fate.