It all started with a trip. Sherlock had been acting weird, and everyone thought he was just stressed, so he and John go on a trip to Fiji. Yet, what was supposed to be a relaxing vacation from the stresses of detective work only opened the door for much more stress and confusion when John begins to have strange feelings around his colleague, Sherlock Holmes. And Sherlock is still acting strange.

Sherlock Holmes had never been one to embrace the concept of caring for another human being. All it does is bring about unneeded complications and these messy things called 'feelings'. Yet, when he crosses paths with an invalidated army doctor named John Watson his entire way of thinking is forced to be changed. Will this change be for better or for worse?

John has only a year left to live. The news leaves Sherlock distraught and broken, but Sherlock makes a vow to make the last year of John's life the best year he's ever had. This is Sherlock's last vow.

Once the rings have been exchanged and the vows have been said, Sherlock and John are ready to settle down and get their fill of the domestic bliss that so often comes with marriage. Unfortunately, nothing is ever that simple for them... and they know the honeymoon period can't last forever. They'd promised each other "for better or for worse", but John had no idea just how bad 'worse' could be.

John is devastated by his best friend and secret love, Sherlock's death. He copes by visiting his grave every day for sixty days. Will this be closure enough, or will John need more to know that Sherlock has heard his words?