Holly and Gerry are a married couple who live in Dublin. They are deeply in love, but they fight occasionally. By winter that year, Gerry suddenly dies of a brain tumor and Holly realizes how much he means to her as well as how insignificant their arguments were.

-

Deeply distraught, Holly withdraws from her family and friends out of grief until her mother calls her informing her of a package addressed to her. Within the package are ten envelopes, one for each month after Gerry died, containing messages from him, all ending with "P.S. I Love You". As the months pass, each new message fills her with encouragement and sends her on a new adventure. With Gerry's words as her guide, Holly slowly embarks on a journey of rediscovery.

(Raamatu sisututvustus Wikipedias)