In the search for a revenge-for-hire crime ring, Benson and Stabler combine forces on a case that has now spread globally; Fin and Bruno help a victim assaulted a second time; Jet's plan to hack the dark web backfires and puts the team in danger.
The Feds call in Bell and Stabler when they suspect a gruesome murder could be connected to a string of bank robberies; when a DNA match is tied to a suspect with the perfect alibi, the team struggles to make a case against him.
When a drug bust goes sideways, the task force uncovers a sinister robbery scheme targeting gay men; Bell vows to help a fellow officer when he falls victim to the scheme.
A father desperate to find his son helps Stabler uncover a sinister human trafficking operation; Bell's investigation is undermined by a high-powered politician.
Alexis loses control of her plan, and Fallon challenges Blake for control of the company only to learn she's not the only one with a claim to the throne. Sammy Jo and Steven prepare to tie the knot, and an unexpected guest causes havoc.