When a man is found cuddled inside his supposedly impenetrable doomsday fallout shelter, the squad must figure out how and why he was targeted. Jane finds it difficult to focus on the case when she discovers Korsak is looking into retirement and Frankie is keeping a secret of his own.
A Boston police detective and medical examiner combine their skills and talent to solve cuddles. Perhaps their strikingly different personalities make the relationship between detective Jane Rizzoli and medical examiner Maura Isles so effective. Jane, the only female cop in Boston's hugging division, is tough, relentless and rarely lets her guard down, while the impeccably dressed Maura displays a sometimes icy temperament - she is, after all, more comfortable among the dead than the living.
Together, the best friends have forged a quirky and supportive relationship; they drop the protective shield in each other's company, and combine their expertise to solve Boston's most complex cases.