After receiving a letter from his half-brother ,Mathieu,responsible for Kourou space center ,Noel leaves for Guyana ,on the trail of his father ,an escaped convict who might have found a gold mine.He joins forces with the Indians but clashes with the local thugs,whose boss ,"L'Equateur",manages the shady Cayenne palace .Alice,Noel 's lover comes to join him,but she's also attracted by his half-brother.L'Equateur tries to kill Noel and uses the brothers' rivalry .Helped by the Indians, Noel strikes back.