After years without any contact, James Wheeler (Robert Patrick) receives a letter from his brother in Costa Rica. He is instructed to meet his brother, and bring with him an ancient artefact engraved with a map. When James arrives in Costa Rica, he discovers his brother has been murdered, and that the map may lead to an undiscovered Mayan civilisation and its hoard of hidden gold. He joins together with a band of mercenaries and sets out on the trail of his brother's murderers. Also starring Fred Ward.