When Grace moves into a luxury high-rise, the last thing she expects is for her nightly security checks to become the highlight of her life—thanks to the building's irresistible doorman, Mary. Between stolen glances in the lobby and after-hours inspections that get far too personal, Grace soon discovers there's more to Mary's services than just safety. But as their connection deepens—and the consequences become impossible to hide—Grace must decide how much she's willing to risk for a passion that breaks every rule.