In the third aliyah Moshe grows up in the house of Pharaoh. Moshe goes out and looks at the Jewish people's burdens. He sees an Egyptian man smiting a Hebrew man. Moshe turns this way and that and he sees that no righteous man was destined to issue from him or convert from him (Rashi), so Moshe kills him miraculously and hides him in the sand. Later, when the matter of this killing becomes known, Moshe flees from Egypt and goes to Midian.
In Midian, Moshe becomes a shepherd, and he marries Tziporra.
Meanwhile, back in Egypt, things get worse for the Jews (according to Rashi, Pharaoh becomes leprous and bathes in children's blood), and their cry goes up to G-d and He remembers them.