When two Police officers from separate precincts attack their wives and demonstrate suicidal behavior, Detectives Benson and Stabler investigate, and connect the incidents to both men serving in the same Reserve unit in Afghanistan. Linking this behavior to a similar trail of attacks in 2002 by officers, Benson and Stabler connect this to a drug called Quinium, which the Army prescribes to fight malaria. When they discover that the Army is aware of its side affects, Novak goes after the government for administering the drug. Meanwhile, Detective Stabler faces some tough personal issues at home with his wife.