Atia, the sister of Caesar and mother of Octavian,is coerced by the senate to reveal the contents of the late general's will - which discloses the fact that he has named Octavian as his successor. This makes him a target for Brutus and Cassius and the other conspirators but Mark Antony is also disappointed by the news. Tyrannus sees Octavian as his responsibility and the pair agree to flee Rome.
—don @ minifie-1