Grace has harbored a secret love for Liam since high school. Years later, she works as an air traffic controller while Liam has become a pilot. Reunited on a blind date, they exchange numbers and part amicably. The two meet again at a high school reunion, where Liam blindsides Grace, who is unaware that he also has feelings for her, when he suggests a marriage of convenience between them. She eventually accepts his proposal and they move in together. They learn to navigate married life and their growing attraction to each other, while keeping their relationship hidden from their colleagues at first, dealing with Grace's lingering insecurities, and facing continuous interference from her half-sister Veronica who hates Grace and wants Liam to be hers.