After a truck filled with armour-piercing rifles is hijacked, the team works to discover who stole it, and what they have planned for the stolen weapons. A friend from OA's past returns to help with the case, but OA isn't sure he can trust him.

When a military veteran suffering from PTSS snaps after the death of his brother in arms, the decorated sniper’s expert abilities push the team to their limits. Also, Crosby’s personal struggles bubble to the surface when the case begins to hit too close to home.

After saving a young girl, Dawson is forced to make a tough decision when she finds out the girl's father is addicted to painkillers. Herrmann loses his cool and gets into an altercation with a police officer after responding to a call. Otis and Cruz are on a mission to find out who Brett is dating. Meanwhile, Boden is skeptical when Donna's brother Julian unexpectedly comes to town.

A hate crime is committed against a Muslim family, resulting in the death of their daughter. Things get complicated when a crucial witness in the case is deported, forcing Barba to drop the charges against a suspect.

In the 18th-season finale, two families seek justice for their loved ones in the wake of a suspect's unexpected release. Soon, public protests on the matter escalate to violence, leading Benson to go to desperate lengths to make an arrest.

The Mandalorian visits an opulent world.