When Sun Mi (Lee Young Ah) was young, he was often ill and hospitalized. He liked the variety of aromas and snow. Sun Mi later diagnosed with the blood disorder myelodysplastic syndrome. Now, as an adult, Sun Mi worked as parfumer, creating a perfume composition. He often traveled to collect the scent of flowers and herbs. During one trip, he visited the aquarium and meet an employee, Sang Woo (Park Hae Jin). Sang Woo care about animals a lot and enjoyed his work there. Sun Mi and Sang Woo love. Sang Woo finally propose to Sun Mi, but was not aware of the difficulties that they will soon be facing.