This is the story of Yvonne Wilson, an accountant, and Oliver, a grossly overweight black-and-white tuxedo cat. Yvonne witnesses an execution-style murder of three people. Even with limited police protection and the promise of being put in the witness protection program, Yvonne fully realizes that MS-13 gang members or the mob are going to kill her. The mob has hired MS-13 gang members to expedite the matter.

After believing that she is in a hopeless dilemma, Yvonne notices a huge black-and-white tuxedo cat that has just appeared in her living room. He is a talking cat named Oliver. Oliver explains that he was sent from heaven to protect Yvonne from the MS-13 gang members and the mob. He assures her that the mob/MS-13 cannot harm her. He will protect her until she dies a natural death.

Yvonne soon realizes that Oliver can back up what he says. He has supernatural powers. He is omniscient (all-knowing), omnipotent (all-powerful), omnipresent (can be in more than one place at the same time), and clairvoyant (can see into the future). Oliver is here for the duration. He will never leave her. After a while, Yvonne and Oliver grow on each other. They become inseparable.

The story is full of love, and there is a human and feline bonding. Yvonne often shoots it out with MS-13 gang members and mobsters. Although close to a deity, Oliver does have some faults. He is always on a thin line between being a law officer and an outlaw. After he becomes an FBI agent, he takes some of his salary and donates the rest to charity. When he is short of cash, he prints $100 bills in Yvonne's basement. Since the bills are real, he can't be accused of counterfeiting.