A gang of ex-convicts, led by their former parole officer, utilizing his familiarity with S.W.A.T. procedures, invades a heavily guarded rare coin auction and makes off with two million dollars is gold in "Sole Survivor." After making a careful study of S.W.A.T. methods, Frank Hunter, a recently dismissed parole officer, recruits a group of ex-convicts with special skills. Then, after setting off a series of false S.W.A.T. calls throughout the city, Hunter and his well-armed specialists help themselves to a fortune in rare gold coins.