Three short stories about Thorgals origins.
The Lost Drakkar
The leader of the vikings, Leif Haraldson, finds a baby on a mysterious raft adrift on the Atlantic Ocean. The child isn't one like any other but the son of Aegir, the God of the Ocean. Or at least that's what the Vikings believe.
The metal that doesn't exist
The Father of the Dwarves, Ivaldir, lost a game of checkers to the snake Nidhogg. They were playing for the name of the loser but snake would settle for the metal that doesn't exist. A loyal dwarf named Tjadzhi is sent out to find this metal and after a long journey and surviving many dangers he finally finds it. A very young Thorgal is wearing it like a piece of jewelry around is neck and together they bring it to the snake to safe the Father of the Dwarves.
The last story is about a teen Thorgal that tries to find the God that came to live with humans. He wants him to help him find out who his real father is. Together they use futuristic technolgy to look into the past. This way he learns who his parents and grandparents were and what happened on the space ship that brought him here.