When a homeless teenage girl wakes up in Houston's Tranquility Park next to a murdered city councilman and then disappears, Homicide Investigator Luis Perez turns to his ex-partner Niki Alexander. Now a counselor with a teen shelter, she may be his only hope in locating the girl. Three years earlier Niki quit the Houston Police Department after a fatal shooting involving a teenage boy. Haunted by the memory and the guilt, she is driven to help troubled...