Guthrie, Oklahoma, 1903. Betrayed by his fiancee's infidelity eight years ago, pharmacist Michael Henderson vowed he'd never risk his heart again. But he doesn't anticipate the tug of attraction he shares with his new employee. Heidi Lester flees her home, determined to prove to her overprotective parents she can conquer her debilitating asthma, to make a life of her own. However, her unscrupulous fiance has no intention of letting her go. He has his own plans for Heidi and her inheritance. Will a scheme to ruin Michael's family force Heidi to marry her fiance, or will assistance arrive from a surprising source to allow her to be with the man she truly loves?