After the Fililippino-Yakuza murders, Adam is confronted at the Five-0 HQ by Steve and Duke about his involvement in the robbery of the Filipino gang. but rather hands in his badge and gun, refusing to confide the truth in angrily-puzzled Steve. A suspicious helicopter crash is revealed to have been shot down by a rocket launcher. The pilot, company founder Jordan Notua, had turned off the helicopter's transponder over a no-fly zone for the Hawaii state bird. There, Steve and Danny discover some professional has gunned down a mansion's guards and stolen hidden weapons. They learn it's Daiyu Mei, unknowingly to them that she is Wo Fat's Chinese mob widow, who continues his arms trade. Making another weapons sale, she turns on the buyers, shoots most and promises the survivor to call an ambulance for him, provided he passes on to McGarrett that she is Wo Fat's wife.
—KGF Vissers