Storks bring babies... or at least they used to. Now they're in the business of delivering packages for a huge Internet sales site. Junior, the best stork at the courier company, is about to go up for a promotion when Buttercup, the only human on Stork Mountain, accidentally activates the baby-making machine and gets an adorable but completely unplanned baby girl. To hide what happened from his boss, Junior and Buttercup decide to make their first baby delivery and embark on a crazy adventure.