Someone has declared war on the city's water supply — poisoning it in the name of The Shadow himself. But the real Shadow has other plans. Lamont Cranston traces the terror to a bitter city chemist whose wounded pride has curdled into something far more dangerous, leading to a white-knuckle showdown atop a water tower that only one man will survive. A 22-year-old Orson Welles stars in this chilling 1938 thriller — one of the boldest episodes in golden age radio drama.