1st Aliya: The three angels appear to Avraham and foretell the birth of Yitzchak. Upon hearing the news, Sarah laughs to herself.
2nd Aliya: The angels depart to destroy Sodom, and Hashem [G-d] tells Avraham about His plans for destroying Sodom. Pasuk 18:18-19 proclaims G-d's confidence in Avraham to teach the world the concept of justice. Avraham negotiates, unsuccessfully, on behalf of Sodom.
3rd Aliya: The story of the destruction of Sodom is told. Lot's generosity to the "two visitors" is rewarded and he, his wife, and only two of their children are saved from Sodom.
4th Aliya: Lot's wife looks back upon the destruction of Sedom and dies, and Lot and his two daughters escape into the mountains. Lot's daughters conspire to rebuild humankind, and taking advantage of Lot's drunkenness, they become pregnant from Lot resulting in the birth of Ammon and Moav. Avraham encounters Avimelech after which Sarah gives birth to Yitzchak in the year 2048.
5th Aliya: Yishmael and Hagar are forced out of Avraham's home, and an angel reassures Hagar of Yishmael's destiny.
6th Aliya: Avimelech and his general Phichol resolve their conflict with Avraham over water rights, and they "sign" a covenant of peace.
7th Aliya: In the year 2085, when Avraham was 137 and Yitzchak was 37, Avraham is commanded to sacrifice Yitzchak. This amazing story heralds the end of Avraham and Sarah's era, and the beginning of Yitzchak and Rivkah's era.