The year is 50 B.C. and Gaul is entirely occupied by the Romans. Well, not entirely… One small village of indomitable Gauls still holds out against the invaders....

But what can Asterix, Obelix and friends do to guard the magic potion against a foe that says:

“An' things ha' come to a pretty pass, ye ken, if people are going to leave stuff like that aroound where innocent people could accidentally smash the door doon and lever the bars aside and take the big chain off'f the cupboard and pick the lock and drink it!”

The job: Steal the Sceptre of Wonders from the Royal Treasury, deep beneath the Pink Palace, in the city of Anaxapajura, capital of the remote tropical island nation of Hcunanzamon. An impossible task, say most.
They don't know about the secret door inside though. On the other side of this door? The fabled place known as Down Below, a vast labyrinth of wonder and mystery, according to legend one of the last remnants of an ancient but advanced society who vanished abruptly thousands of years ago.
But there's a map, showing a safe path through the mysterious machinery, deadly traps and ancient guardians, which will enable you to escape beneath the city to the exit and be away on your waiting ship before the alarm is raised.
Of course, those rumours Down Below has been known to completely change its layout for no apparent reason whatsoever aren't true...

An unfortunate error. Now it needs to be rectified before the wrong people notice and get angry. Go pick up Sam's car they said, it'll be easy they said, you'll be doing him a favour they said. What could possibly go wrong? You're about to find out.