Raven leaned in over her second cup of coffee in the morning, scrolling through her phone. Kade had already left the apartment—when, she didn’t know. It was Saturday; the day before her was a long void.

She watched social media posts flicker by under her thumb.

There was smiling photo after smiling photo, over and over again: people with their ordinary lives. Most of her close friend network was leftover from high school and college. Faces she recognized by ...