 Hudson Nichols frames Mitsou Kamuri for stealing his wife Thelma s string of expensive blush pearls, but offers to absolve her if she breaks off her relationship with his son Grove. Young Nichols confronts his father and promises to marry Mitsou. Mitsou consults Perry Mason, who tries to intervene. Ito Kamuri, Mitsou s uncle, has made two sets of false pearls and is found dead, having apparently committed hara kiri. Perry and Lt. Tragg independently decide that Uncle Ito was murdered. Mitsou is charged with the crime, and Perry must solve the mystery of who has the real pearls.