The aggrieved soldier stopped at a Buddhist temple and killed nine people there, before heading to the mall, shooting at passersby along the way.
We get our first look at Robin, played by Maya Hawke.
"Sincerely, your friendly neighborhood hackers."
All 18 people were safely evacuated after about four hours, but the gunmen escaped and are still on the run. There is no sign of a political motive for the attack.
Around 1,000 refugees have built improvised homes in a derelict mall after fleeing their war-torn hometowns. They have to endure poverty and cramped living conditions as well as prejudice from the locals.