A research scientist explores the boundaries and frontiers of consciousness. Using sensory deprivation and hallucinogenic mixtures from native American shamans, he explores these altered states of consciousness and finds that memory, time, and perhaps reality itself are states of mind.

Army Captain Edward Hall returns to the US after two years in a prison camp in the Korean War. In the camp he was brainwashed and helped the Chinese convince the other prisoners that they were fighting an unjust war. When he comes back he is charged for collaboration with the enemy. Where does loyalty end in a prison camp, when the camp is a living hell?

A British scientist is discovered to have been passing information to the Communists, then kills himself. Another scientist decides that they might have brainwashed him by a sensory deprivation technique, but he doesn’t know if someone really can be convinced to act against their strongest feelings. So he agrees to be the subject in an experiment in which others will try to make him stop loving his wife.

An obsessive psychologist attempts to reprogramme her subconscious mind, but when her actions become increasingly uncharacteristic she fears her experiment is dangerously out of control.

After his wife disappears a man uses a sensory deprivation tank to solve the mystery.