When Emma Daniels's well-to-do family finds itself destitute, she answers an ad for the Gilbert Company seeking young women to be waitresses at hotel restaurants along remote railroad lines out west. The rules for a Gilbert Girl are strict: work hard, act respectably at all times, and no courting allowed. None of them present a problem for Emma, at least until she meets the hotel's builder, Monroe Hartley. His smile and teasing manner were the last things Emma expected to find on the Colorado frontier. But as intriguing as he is, Emma would be risking her job—and her family's lives—if she allowed his attentions.

Building this hotel for the Gilbert Company is the perfect opportunity for Monroe. Not only will it advance his career, it barely gives him a moment to drown in guilt over his wife's death. When Emma arrives, he finds himself drawn to her. But he can't promise her anything, not unless he wants her to end up with the same fate his wife suffered.

Giving in to their feelings would mean losing everything, yet they find themselves growing closer as the summer stretches on. When a man who covets Monroe's job discovers their secret and threatens to reveal it, they must each decide whether their love is worth uprooting everything they've worked so hard for.