The team investigate the murder of a diamond cutter; Jane meets a girl who claims to be Charlotte's daughter.
Three seperate murders take place in Austin, Texas. The victims are two young women, and one young man. They were all seen for the last time at different but large social gatherings.
Castle and Beckett delve into the world of extreme sports when a mysterious motorcyclist shoots an up-and-coming professional skateboarder.
Billy and Cody move to North Dakota with the hopes of striking it rich in the oil business. They meet oil baron Hap Briggs.
Casey is missing spending time with Ashleigh so she suggests she start dating Beaver so that she can hang out with both her and Cappie.