When police officer Stan Shepherd is rushed to the hospital complaining of gastric pains, his horrified friends and family find out that he has been poisoned with arsenic. The situation is especially traumatic for Stan's wife, Celia, whose first husband died after being given arsenic. Although she was acquitted of that crime, local police decide that there is no way two husbands being poisoned in the same way was a coincidence, and Celia is arrested....