《分手信》主要内容：约翰23岁时，高中毕业便不再升学，终日不知所以地换了一份又一份工作，惶惶然地在酒吧饮酒作乐度过，恋情不断却未见真爱。直到有一天，他毅然投效军旅，并于放假回家时，在家乡的艳阳下、沙滩上，偶然结识正值花样年华的莎文娜。21岁的莎文娜，成长背景与约翰相去甚远，不同于约翰的放浪形骸，她单纯、善良、率真，有坚定的理念与信仰，有清楚而明确的目标。透过莎文娜，约翰重新认识了自己，也重新认识了爱情。甜蜜的相处时光总是短暂，约翰必须回到军队，甚至被派驻海外。时间一天又一天地过去，这段靠书信维系、偶而得以见上一面的远距离恋情，终因莎文娜的一封分手信而划下句点。陷入心碎绝境的约翰，没有立刻打电话给莎文娜，也没有立刻飞回家乡，只是把信折好放回信封，决定去哪里都带着它，像是带着上战场所受的伤。
多年之后，始终无法忘怀的约翰来到莎文娜家中，发现了那一封分手信背后的秘密，逐步了解到事情的真相，也拥有了重新再做一次抉择的机会，然而他的决定是。
An angry rebel, John dropped out of school and enlisted in the Army, not knowing what else to do with his life--until he meets the girl of his dreams, Savannah. Their mutual attraction quickly grows into the kind of love that leaves Savannah waiting for John to finish his tour of duty, and John wanting to settle down with the woman who captured his heart. But 9/11 changes everything. John feels it is his duty to re-enlist. And sadly, the long separation finds Savannah falling in love with someone else. "Dear John," the letter read...and with those two words, a heart was broken and two lives were changed forever. Returning home, John must come to grips with the fact that Savannah, now married, is still his true love--and face the hardest decision of his life.