Meet Ratio Holmes! He's not really the great, great grandson of the fictional character Sherlock Holmes, but all the other kids seem to think he is. Now he's a detective whether he likes it or not. Still, he's creative, good at thinking through facts, and has a wicked smart best friend, Jinju. Together, they might make great detectives after all!

Thanksgiving is full of traditions at the Holmes house. Food, family, an annual poker game, and Great Uncle Archie teasing Ratio until he runs to his room crying. This year will be different! Mom suspects that Uncle Archie cheats at poker and she's hired Ratio and Jinju to figure out how to expose him. But that won't be easy. The two detectives/best friends are in the middle of a huge fight and barely speaking to one another.