In a moment of desperation, Ruby Chase makes a vow of servitude to a monster (Frank). She breaks her vow by committing suicide, setting Frank on a course of bloody revenge against the people she loved the most.

In a society where heterosexuals are persecuted and abortion is forbidden, two teens are forced to hide an unintended pregnancy before their secret romance is exposed.

The narrator of our story, Nate, an emotionally detached statistician with a penchant for reducing everything to percentages and probabilities, guides us through the relationship of Ben and Sarah, chronicling its chance origins with the algorithm of a dating app. What is the probability of Ben reviving his relationship with Sarah?