The boring life of a delivery man is turned on its head as he becomes the CEO, finding love along the way.
Strongest Deliveryman centres on the story of Chinese restaurant delivery workers Choi Kang-soo and Lee Dan-ah as they live their daily lives and face the challenges arising from their jobs.
In spite of his humble beginnings, Kang-soo has a fearless attitude and gives his all in everything he does. Dan-ah, a fellow delivery driver, hates her current socioeconomic status so much that she, like many young people, calls her country "Hell Joseon." She is so focused on making money and changing her life so much that she has no time for romance, but when she comes across the charming Kang-soo, her attitude changes.
Together, Kang-soo and Dan-ah foster a budding romance and competitive spirit in their mutual quest for success.