Raised by a drug-addicted mother and criminal stepfather, she became her younger sisters’ only hope—and the rock that held her family together. Now, high school senior Angel Ferente is nowhere to be found.

Last seen on public transit in the middle of the night, the talented competitive swimmer with an independent streak could have ended up just about anywhere. But on the rough streets of Philadelphia, in a community plagued by drugs and violent crime, her family and friends are finding plenty of cause for concern.

Narrated by Angel’s troubled younger sister Jeannine and her swim teammate Alex, Watermarkexplores the challenges of growing up in the inner city in the midst of the crack epidemic and how one girl found refuge in the act of swimming and the steadfast support of her team. Alex and Jeannine form a bond as they find ways to cope with Angel’s absence.

The swim team and members of a struggling community come together in search of the missing teen—will they manage to figure out where she has gone and track Angel down alive?