The Case of the Grizzly Bear. Roxy Roberts is a seven-year-old detective who runs a detective agency from her familys attic. When she is stuck inside because of the rain, she thinks it will be a boring day. That is until her brother, Liam, hears an animal in the house. Together, they set out to discover who or what is growling in their home. They also have to save their babysitter grandpa from whoever or whatever has broken in.