Tomomi and Kaoru where best friends in highschool, but the differences in their lifestyles have created a distance between them. Tomomi has built a happy family that everyone envies while Kaoru lives for her career as a movie producer.
The two friends meet again at the present age of 41 at a class reunion and return to their former closeness. However, things get complicated when Tomomi finds out that her husband and Kaoru are having an affair. Then of all times the two women awake to find their bodies swapped.