COMPLETE! Maybe Sherlock should have guessed that asking John to pretend to tie him to the bed and shag him though the headboard - for a case - wasn't such an intelligent idea. Or, the one in which a femme fatale murder causes Sherlock and John to role-play sex. Repeatedly.

The day he had stood on the street and watched as Sherlock leapt from the rooftop of St. Bart's had been the day that John had died.

John finds himself all tied up. BDSM, SnM, restraint ect.