The episode centers around Sheldon's reluctance to accept the concept of after learning about the treatment of animals raised for meat. His disdain for the idea leads to a confrontation with his family, especially his mother, Mary , who surprisingly considers giving up meat. Meanwhile, Missy tries to exploit Sheldon's new stance for her benefit, and Georgie finds himself puzzled by Sheldon's sudden interest in the ethics of eating meat.

The lecture backfires. Sheldon learns that humans are irrational. To cope, he fixates on a cassette tape of a theremin concerto he found in the garage.