A documentary film that presents a 20 years' effort to organize a lot of indications about ancient ocean exploratory voyages under a logical procedure, rejecting excesses and expediencies. A lot was written in the past about the same subject. Much of this material was under pretension (political, ethnic, religious) common in human character. A documentary film that, through the presentation of an unknown side of history, examines elements of ancient societies that open new dimensions in understanding the basic structures of civilization. As a motive for the presentation of the research, there are scenes of ancient Aegean sailors who were sent to find the "Gate of the Sun," a mythical passage to the underworld, on the other side of the ocean.