Secondary Exposure

Sherlock: "If you were dying, if you were murdered, in the very last seconds, what would you say?"
John: "Please God, let me live."
Sherlock: "Use your imagination."
John: "I don't have to."
After twenty years, the killer who abducted John as a child has resurfaced. Now John and Sherlock must track him down before he claims another victim, and at the same time navigate the shifting nature of their relationship.