After Mary dies, Sherlock and John are in charge of looking after Rosie as dads together. However, a strange figure that is stalking their flat leads Sherlock and John onto another case.
Sherlock, John, and Mary live finely till Mary unearths some secrets that jeopardize her unborn baby. When a case leads to the killing of Mary Watson, John and Sherlock are left to pick each other's pieces back up, and rebuild the other.
It's gay, btw