The brand new boss Seo Jin opens a Korean snack bar in Mexico with the slogan "Profit comes first!" The staff who can't get used to his passion, Yu Mi, Seo Jun, Woo Shik, and Tae Hyung, are more than ready to make this work, but it seems impossible. Even the rain comes to bless their grand opening. "The old Seo Jin is gone. He's a boss now!" Meet them in Bacalar, a beautiful town by the lake.