Setsuko is a single, emotionally unfulfilled woman, seemingly struck with a drab, meaningless life in Tokyo. At least until she's convinced by her niece, Mika, to enroll in an unorthodox English class that requires her to wear a blonde wig and take on an American alter ego named 'Lucy.' The new identity awakens something dormant in Setsuko, and she quickly develops romantic feelings for her American instructor, John.