The sophisticated holdup of an armored vehicle leaves four dead. One of them is an armed robber, with an enigmatic identity, leaving Major Crime to ponder the possibilities. Is this an ordinary bunch of thieves looking to get rich quick, or is there a more sinister motivation behind the robbery?

A Somali teenager is found viciously bashed to death in a lonely railway tunnel. The investigation leads Koa and Malik to a Somali man who is rumored to be recruiting Somalis to return to Africa to fight for Al-Shabaab. Meanwhile, Internal Affairs investigates the shooting of Mahmoud, an accessory in the armed robbery, which causes conflict between Malik and Travis.

The double murder of a Jewish couple leaves few leads. According to the woman's son, a large amount of cash is missing, along with the Palestinian student who was living with them. But the woman's son is lying about critical evidence, and the conflict between the two detectives, Travis and Malik, spreads from the Middle East to the unsolved crimes of multiple murder and armed robbery.