The only thing keeping Joan's dangerous powers under control is her cousin Sabrina's rare ability to counteract them. Luckily, they've got the support of their powerful Family, they're best friends, and they've managed to build a life around each other's constant presence. But now they're seventeen, and things are changing. They don't want to study the same things in college, not to mention neither of them has been on a single date.
When Joan meets the lovely and witty Ellie, she talks Sabrina into trying a group date. That only makes Joan desperate for more time with Ellie. With more proximity comes more risk and the fear that Ellie will eventually notice that Joan and Sabrina are weirdly codependent. Important secrets will be put at risk, which may incur the Family's wrath. Someone could get hurt and not just emotionally. When things inevitably go wrong, Joan is sure Ellie won't stick around, but learning to control her powers without Sabrina by her side is almost impossible.