London Fog

Two years after Mary's death, Sherlock Holmes is pulled into a twisted game of hide-and-seek, when he starts receiving instructions and notes from a number he swore he'd deleted long ago.

At the same time, "Goldie" García, a renewed con artist, is pursued after her past catches up to her. She resorts to ask for help from the one man who owes her a favor.

In what seems to be a life of death pursuit, they'll find themselves patching up their pasts and finding hope in the future.

(Not Sherlock x OC, a bit of Johnlock)