Lily's thirteenth birthday starts off with a bang. Literally. A present explodes on her porch . . . and soon after, a trio of leprechauns (yes, leprechauns) appears in her bedroom. They whisk her away to a land of clover, piskies, a new friend, a cute boy, and lots of glimmering, glittering gold. A world of Green.
It turns out that Lily--as her grandmother was before her--is in line to be keeper for the Clan of Green, in charge of all their gold. That is, if she passes three tests. And she has to pass them. Because if she doesn't? She may never get to go home again. She'll be stuck with the Greens.