In SNDN2, it?s been a few years since good ol? Billy wreacked havoc as an axe-wielding mass murderer suffering from PTSD after a criminal dressed in a Santa suit killed his family when he was a child. But guess who else witnessed the murders? His little brother Ricky, who?s all grown up now, and is ready to dish out some trauma-fueled punishment of his own to all the folks left on the Naughty list.