Action superstar Jackie Chan plays a heavy-hitting acrobatic cat-burglar, who will take up any challenge, no matter how perilous, to finance his gambling addiction and penchant for high-living. Unexpectedly, his life is turned upside down when he and his two partners-in-crime (Louis Koo and Michael Hui) accept a mysterious kidnapping assignment from an eccentric underworld tycoon. When the target turns out to be a cute toddler with a talent for stealing hearts, they are literally left holding the baby! Mishaps aplenty ensue, and events take an even more dramatic turn when they realize the baby's life is in danger, and refuse to hand him over. Soon, they're in the fight of their lives, as they take on specialist police units, mob enforcers and worst of all-dirty nappies!