In the brief time since surviving her first foray into murder investigations, dog walker Matilda Smithwick has lost a girlfriend, inherited a spare house, taken on more business than she can reasonably handle in her current location, and sworn off any and all detective work. When her old friend and client Leigh Matthews begs Maddie to prove she's innocent of the murder she seems to be the prime suspect for, Maddie has no choice but to return to amateur sleuthing.