When a young, interracial couple is found shot and killed inside their car in Fairmont Park, Dr. Megan Hunt promises the grieving parents that their daughter’s killer will be found. Detectives Bud Morris and Samantha Baker are ready to chalk the case up to a murder-suicide, but Megan and her team find evidence on the bodies that sends the case in an entirely different and shocking direction. Meanwhile, Peter advises Megan not to push too hard when it comes to reconnecting with her daughter, Lacey.

Megan is surprised to discover she has a connection to a woman found dead in a hotel room; Megan starts taking an interest in what is going on around her.

When a severed hand and foot turn up in a back alley, Megan and her team must literally piece the victim back together. Meanwhile, Megan's daughter, Lacey, gets her mother's reluctant permission to visit her at the office and film her at work as part of a video essay for Social Studies class. What Lacey learns in the process profoundly changes her view of her mother

Curtis questions Ethan's interest in the investigation of the mysterious death of a beautiful twin; Megan runs into resistance while investigating the death of a patient at the hospital where she used to work.

A magazine editor is found dead in her mansion; Megan confronts a suspect while at a social event with her mother; Ethan surprises Kate with his positive attitude.

A father is found stabbed to death in his home in the Philadelphia suburbs; Kate takes a consulting role in a case with Megan's ex-husband.

Megan and the team investigate when a Philadelphia homicide detective is killed in a hit-and-run; Megan turns to her mother (Joanna Cassidy) for help.

Megan suspects foul play when a young philanthropic socialite dies; the investigation is interrupted by Kate's personal life.

When a young nanny is run down by a car and killed, the 5-year-old child she was watching is kidnapped; an interrogation goes awry.

After Peter rescues a woman from a house fire, Megan discovers another person in the house who died. Peter takes the discovery personally since he had no idea anyone else was in the house. A veteran arson investigator challenges Megan at each step in her investigation. When Megan complains to Kate the response she gets only intensifies the tension between the two women.