故事就從一間包裹運送公司開始，這間公司以前是送子鳥公司，卻因為發生一位送貨員過於愛護其中一位嬰兒糖糖導致發瘋而使公司倒閉，改成宅配公司，多年後糖糖變成18歲少女，不過老闆看不慣她的無厘頭而叫他的準接班人新丁去開除她，但糖糖接到一個小男孩請求為他送來一個小弟弟，意外重啟了「嬰兒製造機」並製出一個小寶寶，現在，新丁和糖糖必須想辦法送這小寶寶到她的新家...

Storks deliver babies...or at least they used to. Now they deliver packages for global internet giant Cornerstore.com. Junior, the company's top delivery stork, is about to be promoted when he accidentally activates the Baby Making Machine, producing an adorable and wholly unauthorized baby girl. Desperate to deliver this bundle of trouble before the boss gets wise, Junior and his friend Tulip, the only human on Stork Mountain, race to make their first-ever baby drop - in a wild and revealing journey that could make more than one family whole and restore the storks' true mission in the world.