Marvin's investigation into an unknown serial killer, coined "the Boner" by local media for mutilating their victims with animal bones, is interrupted by a production crew who's in town to turn the case into a true crime limited series. Meanwhile, Stan grows close with the actor playing Marvin.

In an attempt to become immortal, Marvin drinks a special potion that causes rapid de-aging. Meanwhile, the department hires a new lieutenant.