Shell and her two furry sidekicks must cat-ch a killer to save their pet shop Crishell Shell McMillan sees the cancellation of her TV series as a blessing in disguise. The former actress can now take over her late aunt's pet shop, the Purr N' Bark, and do something she loves. While getting the shop ready for re-opening, Shell is asked to loan her aunt's Cary Grant posters to the local museum for an exhibit. She finds the prospect exciting-until a museum board member, who had a long-standing feud with Shell's aunt, votes against it. When she discovers the board member dead in the museum, Shell becomes suspect number one. Can she, her Siamese cat Kahlua, and her new sidekick-her aunt's Persian Purrday-find the real culprit, or will her latest career go up in kitty litter?