King Numitor's evil brother, Amulius, stole the throne and sent Numitor and his daughter, Rhea Silvia, away. Silvia was sent to the Temple of Mars. She then had two children with Mars, Romulus and Remus.
Once King Amulius found out about Romulus and Remus, he had the two drown into the river. The guards would not drown the children so they threw them into the river instead.
Romulus and Remus we found and raised by a she-wolf. One day when the boys were wandering around a shepard and his wife found the boys.
King Amulius's guards arrested Remus. Numitor was asked to punish him, but when Romulus came to save Remus, Numitor saw the resemblance between the two and his daughter and the boys. He asked Romulus and Remus to help him defeat Amulius.