The authorities of Springfield ask Spirito Santo/Holy Ghost, which in turn will require the help of Diego of Habsburg and his colourful gang, to eliminate the threat constituted by an elusive masked bandit – and arms dealer – known as Solitario.
After gaining his freedom with the help of an old friend of his father, Spirito Santo/Holy Ghost recovers in an abandoned mine the gold fruit of a previous robbery and makes preparations for a new job recruiting a strange sacristan armed with a machine-gun. Meanwhile a Native American sheriff is on his trail.
A crook masquerading as an Army Colonel in charge of gold shipments, replaces gold ingots with fakes. Spirito Santo is recruited to solve the case and make sure the gold gets through.
