When Andi Clark and her therapy dogs are invited to audition for a play at the historic Auburn Opera House, she expects a fun evening of helping local children build confidence. Instead, she meets a director whose razor-sharp tongue leaves a trail of hurt feelings wherever she goes.

Then, during a rehearsal, the director plunges from the theater's balcony.

While Sheriff Skala follows the evidence, Andi and her best friend, Betty, trust Cocoa's instincts. The gentle therapy dog had witnessed someone on the theater balcony before the fatal fall and caught the scent of something behind a locked door no one else thinks to question.

Between therapy animal visits to the local retirement home and hospital, Andi, Betty, and Cocoa discover a second body, proving the killer isn't finished yet. As the suspects multiply and the danger grows, Andi realizes someone is determined to silence anyone who gets too close to the truth.

Can Cocoa sniff out the truth before the final curtain falls on another victim?