Alpha businessman Carter Christian knows he's somewhat of a recluse, but he likes living out in the country with only the rare visitor. When his best friend and business partner suddenly asks him to house his omega son—a son Carter never even knew about—for a short time, Carter is shocked, wary, and intrigued all at the same time. Omegas are rare, and until then, Carter had never met one. For his friend, however, he's willing to do it, even though the act requires that Carter take rut suppressants for the duration of the omega's stay. Nineteen-year-old omega Jackson is tired of being hidden away. His parents plan to mate him to some alpha he doesn't even know, and until then he has to stay with his father's best friend. He finds he doesn't mind the latter so much because Carter listens to him and even tries to help Jackson research omegas. But, all too soon, the time comes for Jackson to mate the strange alpha. Only he doesn't want that alpha—he wants the alpha he's been living with who treats him like a person rather than something to be owned. Jackson doesn't care that Carter's old enough to be his father, but Carter isn't willing to break his friend's trust. Learning his parents may have been right about a government conspiracy against omegas only makes things more complicated for the two men who seem destined to be kept apart.

An omega in need is difficult to resist. In an attempt to protect a young omega under his protection from a deadly government plot, Alpha Maddox Angel has volunteered himself as a mate. He barely knows David Bridges, but since the day Maddox claimed the omega in front of government officials, a tenuous bond has formed between them. After spending years wanting to get away from his family's ranch, Maddox isn't sure he'll be able to settle down there with a mate—particularly not with an omega mate. No one knows much about alpha/omega relationships other than they are said to be highly sexually charged, and Maddox isn't eager to relinquish his control to his ruts. David has lived his life hidden from the government trying to kill him. He never expects handsome, tattooed Maddox Angel—the man hired to keep him safe—to offer to mate him. Part of David is excited at the prospect, but another is afraid that no mating begun out of a sense of obligation can last. The Alpha’s Unexpected Omega is the second book in the SOS omegaverse series, which contains ruts, heats, nesting, erotic customs, and general omegaverse kink wrapped up in sweet, passionate romance. It is recommended that book one, The Alpha’s Forbidden Omega, be read first.