Sara had the perfect life—a loving fiancé, a dream wedding on the horizon, and a career she'd worked years to build. Then Marcus, the charming new coworker with secrets behind his smile, made her a proposition she should have refused without a second thought. One night turned into two, two turned into a web of lies she can't escape, and now everything Sara built is unraveling thread by dangerous thread. As the walls close in and her double life threatens to explode, she realizes Marcus never intended to let her go—and the price of her mistake might be more than her relationship. Some boundaries, once crossed, can never be uncrossed.