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Park Seok is the owner of the successful Café 2Dae coffee shop, a small but much-loved establishment with a group of loyal customers. He works alone in the coffee shop, and has not taken on any staff, even though his solo efforts are starting to take their toll on him. One day, a young man named Kang Go Bi comes to the coffee shop and samples Park Seok’s coffee. He immediately develops an earnest passion for coffee and convinces Park Seok to take him on as a part-time worker at the coffee shop. But Kang Go Bi soon proves that he really wants the older man to become his mentor and to learn how to become a proficient barista in his own right. The duo eventually forms a close bond and learns no end of life lessons from one another – while also helping bring a little warmth into the lives of their many and various customers.