After a Roman legion gets massacred by the Picts and are cut off from the rest of the Roman army, the few (7) remaining survivors set out to escape back to safety before they get hunted down and killed.
Sortof in the same vein as the start of Gladiator, except we're in Scotland the whole time. So if you like the Roman legion in "wherever" type era flicks, or "Gladiator", or "Spartacus Blood and Sand", or "Rome" might as well give this one a watch too. You won't be missing out on anything if you don't see it, but it is entertaining.
And if you like hot painted-up Pict warrior chicks that had their tongues cut out, all the more reason to see it.