Those that live on the bank of the Mississippi River have a word for the weird things that happen there (like being turned to stone, growing a horn, or going missing) - and that's rivery. When something rivery happens, adults gets quiet and children are shuffled out of the room. But when something rivery happens to Duke, Claire's slightly younger cousin, Claire is needed to track him down and try to bring him home.

Of course, this is all complicated by river trolls, rock trolls, a missing turtle, her aunt and uncle being turned to stone and worst of all, Duke liked hanging out with the trolls which was having a very bad effect on him! Because of his ruffian nature, a strange old lady transformed Duke's regular nose into a rhino horn which grew every time he bullied. Because he liked bulling so much, he was rapidly turning into a rhinoceros! All he has to do is something unselfish and POOF! he'd be back to his old normally devilish self, but Duke had no interest in doing anything like that!

Certainly a cautionary tale for rowdy showboats like Duke, Horns & Wrinkles is also a fun adventure for young girls like Claire who love their families, just want to do their best, and like un-girlish things like turtles, frogs and trolls.