In the Salinas Valley in and around World War I, Cal Trask feels he must compete against overwhelming odds with his brother for the love of their father. Cal is frustrated at every turn, from his reaction to the war, how to get ahead in business and in life, and how to relate to his estranged mother.

The rebellious Thracian Spartacus, born and raised a slave, is sold to Gladiator trainer Batiatus. After weeks of being trained to kill for the arena, Spartacus turns on his owners and leads the other slaves in rebellion. As the rebels move from town to town, their numbers swell as escaped slaves join their ranks. Under the leadership of Spartacus, they make their way to southern Italy, where they will cross the sea and return to their homes.