In the beginning of the film, detective Charlie Chan is in Rio de Janeiro, Brazil, along with his son, Jimmy, and the Rio chief of police, Chief Souto, to arrest singer Lola Dean, whom Chan suspects killed a man in Honolulu. After a performance, Lola’s boyfriend, Carlos, asks her to marry him, which she accepts. Her personal assistant, Helen Ashby, then reminds Lola she has an appointment with a Hindu psychic, Marana. Lola visits the psychic, who puts her in a semi-comatose state using coffee and cigarettes laced with a special natural herb. Lola reveals in this state that she did kill a man, Manuel Cardozo, after he refused to marry her in Honolulu. The psychic records the conversation. When Lola wakes up, the psychic tells her what she told him, but assures her that it will be kept confidential between them. On the way home, a worried Lola convinces Carlos to elope instead of marry at a later date. When she arrives home, she begins packing.