Margaret Jacobsen is just about to step into the bright future she’s worked for so hard and so long: a new dream job, a fiancé she adores, and the promise of a picture-perfect life just around the corner. Then, suddenly, on what should have been one of the happiest days of her life, everything she worked for is taken away in a brief, tumultuous moment. In the hospital and forced to face the possibility that nothing will ever be the same again, Maggie must confront the unthinkable.

Hannah Brooks looks more like a kindergarten teacher than somebody who could kill you with a wine bottle opener. Or a ballpoint pen. Or a dinner napkin. But the truth is, she’s an Executive Protection Agent (aka "bodyguard"), and she just got hired to protect superstar actor Jack Stapleton from his middle-aged, corgi-breeding stalker.

Lanie Coates' life is spinning out of control.

She's piled everything she owns into a U-Haul and driven with her husband, Peter, and their three little boys from their cozy Texas home to a multiflight walkup in the Northeast. She's left behind family, friends, and a comfortable life, all so her husband can realize his dream of becoming a professional musician. But somewhere in the eye of her personal hurricane, it hits Lanie that she once had dreams too.

Samantha Casey is a school librarian who loves her job, the kids, and her school family with passion and joy for living. But she wasn’t always that way. Duncan Carpenter is the new school principal who lives by rules and regulations, guided by the knowledge that bad things can happen. But he wasn’t always that way. And Sam knows it. Because she knew him before—at another school, in a different life. Back then, she loved him—but she was invisible. To him. To everyone. Even to herself.

Cassie Hanwell was born for emergencies. As one of the only female firefighters in her Texas firehouse, she's seen her fair share of them, and she's excellent at dealing with other people's tragedies. But when her estranged and ailing mother asks her to uproot her life and move to Boston, it's an emergency of a kind Cassie never anticipated. The tough, old-school Boston firehouse is as different from Cassie's old job as it could possibly be. Hazing, a lack of funding, and poor facilities mean that the firemen aren't exactly thrilled to have a "lady" on the crew.