During excavation work to connect the prison with Washington via underground cable, a Platfeet settlement and graveyard is discovered. Lucky has the work stopped while a famous archaeologist examines the site and both confirms and even claims it proves Indians and Europeans have a common ancestor. Alas the Indians find out and lay siege to the fort. The Daltons escape, but realizing the find is a treasure, Joe is determined to break back in and steal it before escaping again, but neither proves easy. The defense includes moving the whole prison, while the contractor has his own drastic 'solution', which pleases only Rataplan. Written by KGF Vissers