"An Hour Behind" tells the story of dessert and pastry baker Trish Harper, who is quietly ambitious and wary of her older sister Chloe setting her up on blind dates.
One day, Trish meets easygoing paramedic Parker by mistake when he's sitting in the place where her actual blind date, attorney Adam, was supposed to be. She had missed the date due to missing Daylight Savings Time.
Trish and Parker enjoy an unexpected date to remember, but she agrees to meet Adam at last. However, she finds little chemistry with Adam and can't make Chloe understand that.
On the other hand, Trish finds plenty of chemistry with Parker, whose wit, intelligence, and lack of ego charm her. However, she is puzzled by his reserve about his life until she accidentally discovers and misinterprets Parker's most painful secret.