Molly and Bill huddled in the shadowy alley, their eyes fixed on the brightly decorated house across the street. The sound of children's laughter and party music drifted through the air, a stark contrast to their nefarious intentions. "You sure about this, Molly?" Bill whispered, fidgeting with his ski mask. Molly rolled her eyes. "Of course I'm sure. It's foolproof." They watched as another group of kids arrived, presents in hand. "But it's a kid's party," Bill protested weakly. "Exactly. Easy pickings." Molly pulled out a crude map of the house, pointing to various entry points. Bill nervously glanced around, half-expecting someone to catch them in the act before they'd even begun. "Remember," Molly hissed, "we go in through the back, grab the loot, and out before anyone notices." Bill nodded, his resolve strengthening. "Got it. Let's do this." As they crept towards the house, the cheerful chorus of "Happy Birthday" erupted from inside. Molly grinned wickedly, while Bill tried to ignore the gnawing guilt in his stomach. The greatest heist of their career was about to begin, and it would be anything but child's play.