When Sun-Mi (Lee Young-Ah) was young, she was often sick and hospitalized frequently. She enjoyed encountering various scents and the snow. Sun-Mi was then diagnosed with the blood disease Myelodysplastic syndrome.
Now, as an adult, Sun-Mi works as a perfumer, creating perfume compositions. She travels often to collect various scents of flowers and spices. During one of those trips, she visits an aquarium and meets an employee, Sang-Woo (Park Hae-Jin), there. Sang-Woo cares about animals a lot and enjoys his job there. Sun-Mi and Sang-Woo fall in love. Sang-Woo eventually proposes to Sun-Mi, but is unaware of the difficulties they will soon face.
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