Olivia helps unravel a ghoulish mystery. Parker takes Olivia, her spunky calico, to visit family at a guest ranch in Colorado. Olivia makes herself quite at home among the critters. She even learns how to ride a horse. But their vacation turns ghastly when dead bodies show up in the most unexpected places, then disappear seemingly without a trace. Olivia is on the job, though, pawing up vital clues that could eventually lead them to the macabre truth. Along the way, Olivia is catnapped in a cruel plot, she rescues vulnerable ducklings, and she teaches a few lessons in cat appreciation.