Love at First Sight starts when Hadley, an American who is always late, misses her flight to London. So when she meets Oliver by coincidence, she decides to book the next trip. The two experience a strange chemistry and learn what love might be like as they make their way to London. As the voyage goes on, they learn that even though the two are different, they have similar deeper desires. The two realize they are falling in love as they race around London to conclude their days. The question is whether or not they will have a chance to get back in touch.