Felicity has been called back to Walter's office. I'd like to take a moment to request lots more Felicity Smoak. She's fun! She tells Walter that it's Christmas and makes a joke about suicide. That's weird. He wants her to analyze the notebook he found (because what the heck, computer experts are basically geniuses at everything, right?) and warns her about what happened to Josiah (he tried to investigate and got killed). She answers, "I hate mysteries. They bug me. They need to be solved." More of her, please -- and less of pretty much everything else.
Oliver walks through the room where Helena shot those Triad goons, which is a bad idea. You have enough problems with your own crime scenes. Then he calls Diggle to tell him that the situation is "War."
Frank Bertinelli also gets the word, so he tells his contact to tell everyone to "strap up."
China White kills one of Frank's bodyguards from behind. Then she tells her goons (who appear to have been right in front of him) to leave no one alive. They kill several Bertinelli goons and enter the house. So... the war between the Triads and the Mob doesn't involve any innocent bystanders being hurt? It's just the Triad going directly to Frank's house and killing people who are directly associated with the Mob? This seems fine, actually. Oliver, however, disagrees. Because as one Triad goon runs up the stairs, Oliver shoots him in the chest. Way to kill a guy, Mr. No-Kill.
China White kills people as she moves through Frank's house. Frank gets a laptop out of a safe and puts it in a suitcase. As China's about to kill him, Oliver shoots the knife out of her hand and hits her in the leg. He tells Frank to run. No idea why, but there you go: Oliver is willing to kill Triad goons in order to protect the head of the mob.
Frank shoots his way out. Then Helena crossbows him in the calf. She explains that it's payback for Michael (her fiancé). He protests that he did it for the family. She answers, "I had to take everything away from you because you took everything away from me. You finally know what it feels like to find out your own blood is responsible for the death of your entire world." Oliver shoots the crossbow out of her hand and they fight. Frank rolls over to the crossbow and shoots Helena in the shoulder, so Oliver punches him and carries her off.