亨利·罗斯（亚当·桑德勒）是个典型的花花公子，他最擅长的事就是以不同的身份，让美女迷恋上他，并在事后，迅速从关系中脱身。身为夏威夷海洋馆的兽医，亨利有着无尽的浪漫情怀来感染到此休闲的美女，这一次他看上了在餐馆独自用餐的露西(德鲁·巴里摩尔饰)。 　　他们在一起谈天说地，用百吉饼搭建小房子，笑声不断。亨利对女孩恋恋不舍，相约明晨再次一起用餐。然而，第二天清晨，当亨利热情的与露西打招呼时，露西却宛如陌生人一般冷淡。原来女孩由于车祸患上了奇怪的短期记忆丧失症，记忆永远停留在车祸的前一天。 　　情圣亨利遇到了自己的难题，他坠入的情网，却爱上一个不断对爱情失忆的女孩儿……Henry Roth lives in a Hawaiian paradise with the company of endless women with no strings attached. This is until he meets Lucy Whitmore. Both Henry and Lucy enjoy the company of each other and feel the start of a serious relationship occurring. Approaching Lucy the next day, Henry is confused when Lucy fails to recognize him. This is the moment Henry discovers that Lucy actually suffers from short term memory loss and can't remember each individual day. Henry won't let this stop him and is prepared to make her fall in love with him all over again, each and every day.