Serving as a direct sequel to both Sins Past and The Keeper, Strings of Darkness is a spiritual successor to City of Terror, with Tapp taking on a Damien-like role and, together with his new partner, embarking on a mission of stopping the mysterious Puppeteer from establishing global anarchy. In season 1, the story is divided into two distinct parts. The L.A. storyline focuses on Tapp and Tracy dealing with the murder of Mr. Black, which takes them on a wild goose chase, seemingly orchestrated by the Angels, the city's most powerful gang. This part of the story also introduces the city's administration, a small group of street thugs, led by a dealer named Ellis, as well as Mr. Black's family - his mother Alexandra and half-brother Julian. The Moscow storyline follows Sergei, Scott, Patar and Konstantin as they are trying to root out a traitor and figure out the identity of Metalface, a mysterious assassin targeting their agents. This part of the story introduces Lana, TT's sister who was a part of the Angels and has arrived to Moscow to look for Carmella, who was a fellow Angel. Far from all of this, in a Siberian jail, Vasily makes an alliance with a former crime lord named Boris.
