Luci Minici was a roman that had lived in Barcino. When he was 7 years old his father who had an important position in the roman army brought a young slave and his mother for work for his family. This slave called Teseu have the same age of Luci and became the nightmare of our protagonist during his childhood.
Teseu did some malicios actions but the family of Luci thinks that he have fault. Not until he is 16 years old that his mother realizes that who stole the jewels was the mother of Teseu and ordered to kill her, after that Teseu run away and disappears. After that Luci enlisted to the army with his father. During his years he got some titles and thanks that he met the emperor Adrià. They became friends easily because both were educated people.
One they during a carriage racing Luci realize that one of the charioteers was Teseu.
Luci who was a good chariotter too challenge Teseu a one race. If Teseu win he will be free, but if the winner is Luci, the former slave have to become a slave again. Teseu can't win to Luci and decide commite suicide before became a slave.
Some years after when his father is in the bed about to die explain to Luci that Teseu was his son.