Romantic comedy starring Drew Barrymore as Lucy Whitmore, a beautiful woman suffering from acute short-term memory loss. After a car accident several months before, she has been left with a rare brain condition that causes her memory to be totally erased every night when she goes to sleep. Adam Sandler plays Henry Roth, a vet who works at the aquarium in the Hawaiian resort where Lucy is living a quiet life with her over-protective father (Blake Clark) and goofy brother (Sean Astin). Henry usually spends his summers seducing a string of female tourists that he'll never see again - but when he meets Lucy he realises he's found something special, and resolves to give up his promiscuous, non-commital lifestyle. The only problem is, when he meets her again the next day, she hasn't got a clue who he is. Henry embarks on an elaborate quest to win her heart, with the help of his stoner best friend Ula (Rob Schneider). Dan Akroyd makes a cameo appearance as Lucy's doctor.