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After Eun-jo (Jeon Ji-hyeon) ends her tenancy of Il Mare, a posh house on a lake, she writes to the new tenant (Lee Jeong-jae) asking for her correspondence to be forwarded. When the tenant replies, Eun-jo discovers that his letter is dated 1997, two years before she contacted him, and that he is the original owner of the property. Il Mare was released in South Korea within a few months of Ditto, another film to explore the themes of national identity and love across time.