A man is found dead inside his doomsday shelter. Maura determines he was suffocated by gas pumped into the shelter. Jane becomes distracted when she thinks Korsak is going to retire. Frankie has a secret.
Jane and Maura investigate the death of a young woman who is found washed up on the beach. Maura confirms that she drowned and manages to trace the exact location by analyzing the water in her lungs: a tank in an old fish factory. Jane is somewhat upset to find that an old flame, police Lt. Rafael Martinez, is back in Boston. They had worked together in the narcotics division but their relationship ended after a confidential informant had been killed and Martinez left to join a special task force some 8 years ago. The dead girl is identified as Brenda Thompson, a ...
The squad gets involved in an incredibly dangerous scenario when a horrifying incident occurs during a drag race; Jane gets a lead that points to drug trafficking being the motivation for a murder; an investigation is hindered.
Two puzzling murders share a surprising link that could be the key to finding the perpetrators. Meanwhile, Jane and Casey come to a crossroad and Maura assumes caretaker for Patrick Doyle, Sr. who is being released from prison.