Samson is a young male whale growing up in the Arctic Sea; he is still not able to recognise danger and is very fond of the white whale Moby Dick, that , as the legend says, will come back one day to protect all the whales. While exploring the marine world, Samson meets Sally, a little whale who saw her mother being killed by humans. Samson undergoes many experiences that bring him to the awareness of his own strength, which he realizes must be used to protect his own species.