The Greatest Detective rat of all is back - but this time it's personal.
When Patrick the Magnificent goes missing after picking the lock at the First Rodent Bank, Chief O'Malley and Spencer (leader of the River Road Mouse Gang and head of the Society for the Cooperation of Rats and Mice) set out to find him.
It's isn't long before the trail leads to Kurt Remarque, poisoner and disgraced businessrat - the most evil rat ever to stalk the streets of Rodent City.
But finding the missing mouse is just the start of this spine-tingling mystery. Before it ends, there will be helicopter rides, buried treasure and doughnuts...