Single in Seoul follows the story of writer Jane, who is a firm believer in living a fulfilled life as a single person. She loves her independence and doesn't feel the need for a romantic partner to complete her. On the other hand, her editor, Sarah, is desperately seeking her better half and is determined to find love.
Despite their differing views on relationships, Jane and Sarah find themselves at odds when they are tasked with writing a book together about the single life in Seoul. As they work together, they discover that they have more in common than they initially thought, and begin to challenge each other's beliefs about love and independence.
Throughout the process of writing the book, Jane and Sarah navigate their own romantic encounters and personal struggles, all while learning valuable lessons about self-worth and happiness. They come to realize that living a fulfilling life doesn't necessarily mean being single or being in a relationship, but rather finding contentment and joy within oneself.
As they continue to work on the book, Jane and Sarah's perspectives on love and relationships shift, and they ultimately come to a mutual understanding and respect for each other's choices. In the end, they successfully finish the book, showcasing the complexities and nuances of modern relationships in Seoul.