Not knowing whom to trust, Millie goes rogue to get to the bottom of the Somervilles' criminal enterprise before Holborn can interfere; when Janet makes an unexpected decision, Millie must take extreme measures to protect the ones she loves.
In Kingston, Curtis faces the consequences of Millie's actions and must decide what matters most; an undercover Millie arrives back in London and must find and save Romeo before the mysterious "Lindo" can stop her.