Sentence:  Plucky old Walder Frey gathers his family for a feast and toasts to their massacre of the Stark family. He compliments their bravery in stabbing a pregnant woman and her fetus to death. As every last Frey man swigs their special wine, Walder hypes the cunning it took to invite guests into your home and ambush them. But then things <WSD>take a turn</WSD>, the men starting to keel over as Walder seems to admonish them for leaving certain threads hanging. At last the room is empty but for Arya Stark, holding Walder Frey's face, and a couple girls she leaves alive to spread the legend. “Winter came for House Frey.” 
Meaning of the word marked with <WSD> tags:  Change in direction, tone, or tendency.