A very literal trip to hell for Thorgal. Thorgal, his family and their
friends Darek and Lehla have left their island to sail south and look
for a safer place to live. After a storm scatters them, Thorgal and
WolfCub's boat flounders on reefs at the foot of a strange, mist-covered
cliff. One perilous climb later, the little girl is trapped by a
mysterious, invisible force, and her father, after going for help,
discovers a very curious city cut off from the world...