Halli loves the old stories from when the valley was a wild and dangerous place - when the twelve legendary heroes stood together to defeat the ancient enemy, the bloodthirsty Trows. Halli longs for adventure but these days the most dangerous thing in the valley is boredom. He tries to liven things up by playing practical jokes.
::::::::::::::::::::::: Long ago, Halli Sveinsson’s ancestors fought monsters in the valley and drove them up into the hills. Halli wants to be a hero too, but when he rebels against his peaceful, boring life, he unleashes a series of terrible events. With the help of a girl called Aud, who is just as brave and curious as he is, Halli begins to piece together the secrets of the valley – but what they uncover threatens to destroy them . . .