Soo-In (Han Ji-Hye), Bok-Nyeo (Ko Du-Shim), Poong-Geum (Oh Hyun-Kyung) and Mi-O (Ha Yeon-Soo) were cellmates at a woman's prison. The four woman have their own stories on why they were there, but through bakery lessons, learned in prison, they open a bakery shop and compete against a large bakery company.