Emily Carter is a professional organizer hired by a state politician to pack up his vacation home in the Berkshires. En route, she is adopted by a liger (lion/tiger hybrid, largest of all cats), whom she names Baby. At night, she’s lulled to sleep by his purr and awakens to find him gone, with a naked man prowling her bedroom.
Baby, a/k/a Mark, has been in feline form for several years, having rejected the complications of human existence for the simpler life as a cat. Emily makes him want to be human again, at least for a while. His cat brain views her as a new toy, and he wants to chase her down and play with her.
Emily, the very opposite of spontaneous, is nevertheless drawn into his games. Together, the lady and the liger learn to work and play together, evading a fame-seeking blogger intent on getting a scandalous story about the politician.