Episode Description: Beware, spoilers! To read - hover over the text.
In Starling city appears a detachment of soldiers from the League of Assassins, led by Nyssa and maseo, which is now called Sarab, who arrived in the city on the orders of RAS al Ghul. They make Oliver an ultimatum — if the Queen will not find and will not present Sara's killer in 48 hours, the League will start killing the citizens of Starling city. Find out who really is the killer of Sara, Oliver decides to meet with RA's al Ghul personally. In the flashback, Oliver and maseo questioned one of the subordinates of China white will know that she's after a kind of super virus "omega", the ability for a few hours to kill the whole city. China itself is white, learned of the interrogation, stated in the house maseo and kidnaps his wife Tatsu.