Willow Tate is a graphic novelist who earns just enough money at her craft to keep he rent-controlled Manhattan apartment and still put food in the refrigerator. Then she decides to write about a troll who's a superhero - and one suddenly appears, causing mayhem in Manhattan. The odd thing is that nobody except Willow can actually see the stony red giant. Willy thinks she's going crazy just like her grandmother did, until she meets...