A year and a half after his best friend's death, Dr. James Watts is doing the best he can to move on, with little success. Sherlock is the last person he expects to see at his door. Coming back to 122 Break Street is the best decision Sherlock's ever made, but with his fame soaring and new enemies eager to see him destroyed, will he be able to face his most important challenge - fixing the friendship he fractured when he left Watts behind?