Baek Mi-reu, a young head of household barely making a living through part-time jobs. One day, an unknown naked man falls from the sky and appears before him. His identity is the alien 'Wonbyeol,' who crash-landed on Earth. With nowhere else to go, the alien Wonbyeol, after desiring Mi-reu's "essence" (Jeonggi), begins to approach him, calling him 'wife' (Saekshi) and insisting on replenishing his vital energy (Jeonggi)...! "Looking for an alien wife? Who is that wife?" From that moment on, the unpredictable alien sexy commotion begins!