The eponymous central character is a normal man whose brain was transplanted into a large, stone body by aliens, and who lives an extraordinary life on Earth following his escape.

Later, Concrete climbs Mount Everest, becomes involved with a group of hardline environmental militants, and reluctantly agrees to become the spokesperson of a campaign to voluntarily reduce the Earth's population.

He is constantly breaking telephones and doorknobs, and must hire an assistant, Larry Munro, because his hands are too clumsy to handle a pen.

In his new body, Concrete decides to use his tremendous strength, endurance and vision for a series of adventures he never thought of in his previous sedate life.

Hiring a personal assistant writer and accompanied by a scientist who is assigned to monitor his body, Concrete has a wide variety of adventures.