On a trip to Britain Halvar and his men are captured by fierce Celtic women warriors who accuse them of plundering their kingdom. For once, Halvar is innocent but the Britons insist that he must prove his innocence by undergoing four trials by ordeal. Only after Halvar has successfully passed through trials involving earth, wind, fire and water can he and the Vikings be freed. Thankfully Vic's experience at making the drakkar sea-worthy has given him lots of ideas on how to outwit the Britons.