A psychologist conducts unimaginable field experiments asking his human test subjects to make the impossible choice, but Detectives Nichols and Stevens are even more surprised by the man's inspiration.

A new murder fits the style of a serial killer who was executed months earlier. Stevens must figure out if the killing is a copycat crime or if she helped convict an innocent man.

A government official blackmails two doctors for overcharging patients before he is killed. The doctors have another secret to protect, however, and worry that someone will find out mobsters financed their practice.