霍莉与盖里深爱彼此，虽然有时候他们会有争吵，可是这些都是他们生活中的情趣。霍莉感觉自己已经找到了最爱，盖里却在他们婚后罹患脑癌并逝世了。自此，霍莉便生活在失去挚爱的痛苦中。

　　她感觉丈夫并没有就此离开，她还能在家中感受到盖里的气息。她把自己困在家中，两位好友丹尼丝、莎拉及霍莉的母亲还有母亲酒吧里的酒保丹尼尔都十分担心她。就在她三十岁生日的那天开始，她便不断收到由盖里给她寄来的信，每封信的最后都加上一句“我爱你”的附注。盖里的信为霍莉的生活注入了力量，她一步步的向前走，但事实上盖里已经死去了，她终究要自己独自生活。

Some people wait their whole lives to find their soul mates．But not Holly and Gerry．

They were childhood sweethearts-no one could imagine Holly and Gerry without each other．

Until the unthinkable happens．Gerry’s death devastates Holly．But as her 30th birthday looms Holly discovers that Gerry has left her a bundle of notes，gently guiding her into her new life without him,each signed'PS,I Love You．

With some help from her friends，and her noisy and loving family,Holly finds herself laughing,crying，singing, dancing—and being braver than ever before．