It was two weeks that would change their lives forever. Soon after John (Tatum) and Savannah (Seyfried) fall madly in love, their relationship is put on hold. With one leaving to complete his service, and the other to complete her college education, they pass the time by exchanging a continuous stream of love letters, until they can be reunited permanently a year later. But when war breaks out, their separation is extended indefinitely. Will their relationship survive the greatest test of all: the test of time?