The Norwegian explorer Thor Heyerdahl crossed the Pacific ocean in a balsa wood raft in 1947, together with five men, to prove that South Americans already back in pre-Columbian times could have crossed the sea and settle on Polynesian islands. After financing the trips with loans and donations they set off on an epic 101 days long trip across 8000 kilometers, while the world was waiting for the result of the trip. The film tells about the origin of the idea, the preparations and the events on the trip.