As their gladiator training continues, the enslaved Decimus Rex and his five cellmates are forced to endure a series of public trials in the Arena, including hand-to-hand combat with a fellow slave, under the watchful eye of the trial-master Slavious Doom.

Decimus Rex has escaped Arena Primus in the company of a fellow slave, Olu Umbika. Together, they manage to board a slave ship and sail away from the trials and Slavious Doom. But now their four friends are being used as bait to get them to return. Decimus and Olu must reach the Suvius Tower to rescue their friends before they get captured themselves!