April 13, 1967 was a fateful night, when both Shinobu Mastumoto and Chizuko Daimaru were born under the same mysterious star. Their family backgrounds couldn't have been more different. Chizuko was born into a family of power and wealth, and her mother died during childbirth. Shinobu's family was poor, and her father abandoned the family and became a petty criminal, drifting in and out of jail for years. But despite their differences, Shinobu and Chizuko share a common destiny, intertwined by a secret that could end up tearing both families apart.