Daidai and her husband Hiroshi have what many of their friends believe is a perfect life. Daidai has recently left her job as curator of the Japanese American Museum in Los Angeles’s Little Tokyo so that she and Hiroshi, a university professor, can try for a baby. Frustrated by their lack of success so far, and by their increasingly clinical love life, Daidai befriends Satsuki, one of Hiroshi’s graduate students. Newly arrived from Japan, Satsuki clings to her friendship to Daidai and quickly becomes a mainstay in their household. Spurred by a revelation concerning Satsuki's estranged mother and a disturbing trip to Japan where Daidai discovered Satsuki's father was engaged in illegal, and illicit, activities, Daidai begins to seriously question Satsuki's seemingly innocent connection to three possible murders. Daidai's concerns about Satsuki are dismissed as jealousy by her husband until Daidai's investigation will lead to a harrowing confrontation between the two women, and Satsuki's true intentions will be revealed. At once a taut psychological thriller and examination of cultural divides, Shigekuni's is never as it appears.