Darkus Knightley is used to expecting the unexpected. An extraordinary crimesolver, with immense powers of deduction, and regularly found bedecked in tweed, Darkus is anything but the average 13 year old.

Despite trying to leave his detective ways behind and wanting to lead a normal life, when his father's loyal housekeeper, Bogna, goes missing, Darkus must return to the family fold to solve the mystery. Alongside his father, Alan, and his stepsister Tilly, Darkus follows the trail to America and the bright lights of Las Vegas where they must once again face the deadly criminal...