The novel is set in Gwangju, South Korea in mid-2013 where Gaia Choi is known for her positive outlook on life and knowledge about flowers. Despite her optimism, she shared heartbreaks. Her childhood friend, Yohan Min, left her without a word five years ago while she waits for him in Sajik Park Observatory. After five years of loneliness, she then meets Harry Jung, an heir to Jung Group of Companies, and becomes her regular customer. He buys flowers for his lover, Cleo, every week. However, he then discovers Cleo's secret: she dates wealthy men who can spoil her with expensive gifts and luxuries in life. Harry then ends his relationship with Cleo and pursues Gaia instead. Yohan finally returns to South Korea after he graduated from the Royal Academy of Music in England to look for Gaia and confess his love for her. Gaia rejects Yohan but he persists. He will do anything in his power to have Gaia for himself. Harry and Gaia now have to fight against Yohan's obsession for them to live happily ever after.