Nate the Great doesn't especially want to go to a birthday party for Annie's ferocious dog,Fang.But he can't resist a mystery--and when Annew loses her house key and can't get inside to set up the party,Nate and his trusty dog,Sludge,are hot on the trail.Their only colue is a mysterious poem written by Annie's friend,Rosamond.But nothing is too tough for Nate the Great--not even Fang!