Holly Kennedy is beautiful and intelligent addition, a happy woman because she is married to Gerry, his great love, an Irish impetuous, passionate and fun. But fate plays both a trick and Gerry Holly loses more fully at the time of their lives. Holly is devastated, knowing that for her all over also, paradoxically, the only human being who could help her is the one who is no longer with them, because nobody knew Holly as well as Gerry. Fortunately, Gerry has taken precautions and, before leaving, has written a series of letters to his wife, as a true spiritual guide to help not only to cope with the pain but to rediscover itself, to recover the meaning of life . Holly gets caught the first letter the day you turn thirty, in the form of a cake, accompanied, for even greater embarrassment of a tape recording from Gerry himself where the calls to leave their grief and go out and celebrate. In the days and months will continue to receive constant Holly Gerry messages under the most unexpected ways, each of them proposes new adventure and each initialed the same way: PS: I LOVE YOU.