Just out of college and completely alone in the world, Maggie Montgomery has one shot left to save her life from an abyss of poverty and hopelessness. Clinging to the last shred of fuel and hope, she arrives at the mansion of Texas billionaire Conrad Ayer. Although Maggie is clearly not what Mr. Ayer and his wife have in mind for a nanny, they agree to hire her temporarily until they can find someone more appropriate to fill the position.
Houston firefighter Jeff Taylor is a fireman's fireman. He's not afraid of anything, and no situation is too dangerous to keep him on the sideline if lives are at stake. Lisa Matheson runs a semi-successful ad agency that's on the brink of falling apart. Her employees are incompetent and her schedule has become exhausting. When she takes on a client with a brilliant idea for a big conference, she thinks that maybe, finally this is her lucky break.
Ben Warren has life all figured out. At 35, he's successful in his work and free as a bird everywhere else. He has no desire to be tied down like some of his friends, and he sees no reason to change that. Then the unthinkable happens and causes him to rethink everything about everything. Kathryn Walker can't figure out what she's doing wrong in the dating department. The rest of her life makes sense. She's compassionate, strong, honest, hardworking, and still alone.
Hoping for some excitement and a little extra money, A.J. Knight signed up to be a Houston EMT. However, when he did, he never thought about the life-and-death situations he'd be put into or the lives that he might be called on to save. Worse, he never so much as considered the lives that might be lost while he was working to save them.
Blaine Donovan has a secret, but so far his plan to keep the rest of the world in the dark about who he really is and what's really going on in his life has worked. If he can just finish school before the demons catch up with him, he knows he can make life make sense once again. However, when he runs into Melody Todd, a semi-friend he had thought was long-gone, life takes a turn Blaine wasn't at all expecting.