Is taoiseach neamhscrupallacha é Tadhgus Dháthaobhix atá sásta comhoibriú leis na hionróirí Rómhánacha. Tugann sé dúshlán do Taoisix aghaidh a thabhairt air i dTroid na dTreabh — comórtas ina dtabharfaidh an buaiteoir smacht ar threibh an chailliúnaithe. Ar an drochuair, bhí timpiste ag an draoi Ogamaix le menhir agus ní raibh sé in ann níos mó den potion draíochta a ghrúdáil. Agus Troid na dTreabh ag druidim linn, tá an ghéarchéim ag éirí ina tinneas cinn go tapa do Asterix agus a chairde!

Tadhgus Dháthaobhix is an unscrupulous chieftain who’s more than prepared to collaborate with the Roman invaders. He challenges Taoisix to face him in the Troid na dTreabh — a contest in which the winner gets to rule over the loser’s tribe. Unfortunately, the druid Ogamaix has had an accident with a menhir and in unable to brew more of the magic potion.