The Three Investigators [076]: The Mystery of the Voices from Nowhere

“My sister wants me dead!” The old lady sitting next to Jupiter in the waiting room is on the verge of a nervous breakdown. He smells a new case for The Three Investigators and offers his help. But what he learns gives him goosebumps. The voices that terrify Miss Holligan apparently come from the afterlife, for her allegedly abusive sister died three months ago. Jupiter, Pete and Bob must hurry to solve the case. Miss Holligan has a bad heart condition, and every new abuse can put her life in jeopardy. But who is really behind the mysterious voices?