If you knew the world was ending, what lengths would you go to protect the people you love? How would you ensure their survival? And what secrets would you want to stay buried?

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.

Confronted by an unfamiliar world where nothing and no one are what they seem, the sisters must unravel the truth about their father and the mother who may have abandoned them, while struggling to hold onto the one constant in their lives-each other.