Nicky and Henry follow a lead involving a professor who may be able to help in their search for Zhilan. Meanwhile, as Althea's past comes back to haunt her, a squabble between Jin and Mei-Li points to bigger issues in their marriage. Elsewhere, Nicky steps in to help a young worker after learning of some suspicious activity happening at King Kwong's garment factory.

An officer-involved shooting in Chinatown sends shockwaves through the community. Mei-Li and Jin are forced to revisit a traumatic experience from their past. Nicky and Henry make a startling discovery about the weapons.