As they set off into the San Francisco Bay, the inmates disappear into the fog, leaving behind only a few clues and a cryptic message. The authorities launch a massive search operation, but despite their efforts, the three inmates are never found.

As the escape plan unfolds, the inmates encounter numerous obstacles, including the prison's strict rules and the watchful eyes of the guards. However, Morris, Clarence, and John are determined to freedom and use their skills and ingenuity to overcome the challenges.