Arnie knows all the doughnuts in the bakery, but he and the others are puzzled by the giant round maybe-doughnut (or maybe not doughnut) that Mr. Baker Man has just put on display.

"Ms. Flamingo's cat, Fluffy, is missing...and there's only one detective who can crack the case! Meet Agent Lion--he works at Super Detective Agents Agency, wears a tiny blue hat, and loves jelly doughnuts. But most importantly, he is determined to find Fluffy. Agent Lion searches all over Mrs. Flamingo's building--from Mr. Wombat's apartment to the top of the roof--and the missing cat is nowhere to be found. Will Agent Lion ever crack the case?"--Publisher....

A generous but increasingly put-upon bear makes batch after batch of doughnuts for her woodland friends without saving any for herself.