Stateside strife taints Holmes and Watson's fresh start in London when someone close to them is wounded by an unknown perpetrator in the US. Meanwhile, Holmes' stateside legal trouble threatens to derail their efforts.
Danny takes on a personal case involving a drug cartel member. Erin is given a promotion but soon finds herself in a challenging situation.
After landing a technology mogul as a client, the firm must figure out a way to combat hate speech on his social media platform.