This time it's not Rosco who's been making mischief - it's the leprechauns! Rosco and Sparks are marching in the St. Patrick’s Day Parade, accompanied by Rosco's owners, brother and sister, James and Mandy. But Mandy thinks the leprechauns have jinxed her with bad luck, so when Sparks goes missing, what will it take for Rosco and the kids to find him? And will Mandy be able to restore her good luck, or will the leprechauns ruin her St. Patrick's Day? Find out in this heartwarming, family adventure, complete with charming illustrations inside.