Only Tommy, now an undertaker's corpse collector, kept in touch with dodgy father Frank Rizzoli Sr., who now comes along visiting the siblings, seeking help to ask their mother for a divorce so he can remarry. Maura hasn't forgiven Jane for her father's shooting, so they converse icily professionally on the case of college student and environmental activist Rachel Lawson (25), strangled in the university's underground tunnels. Colleagues maneuver them into sharing a car investigating a lead to her yoga master, Sensei Matta, who recently bought 20,000 acres in Western Massachusetts. Frank Junior and Frist also discover the murder of a geology professor on the trail of Matta's illegal fracking, which the detectives discover the hard way.