Samantha (Jennifer Love Hewitt) is an American music student living in London, carefree, impulsive and madly in love with her English boyfriend, Ian (Paul Nicholls). But Ian is wedded to his high pressure, high finance job and he's too busy to notice that by ignoring his emotions and neglecting his adoring girlfriend, he runs the risk of losing her altogether. When the situation takes a tragic turn, Ian at last realizes his true feelings for Samantha. If only he'd told her what he really thought. If only he could re-live his last day with her and put things right. If only...