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.