Gaal Dornick leaves her life in Synnax behind when the galaxy's greatest mathematician, Hari Seldon, invites her to Trantor.

The Foundation makes the long journey to Terminus as Gaal and Raych grow closer. The Empire faces a difficult decision.

Brother Dusk reflects on his legacy as he prepares for ascension. The Foundation arrives on Terminus and finds a mysterious object.

Salvor faces off with an enemy of the Empire. Brothers Day and Dusk are at odds, while Brother Dawn wrestles with his truth.

A flashback reveals the origin of Gaal's conflict between faith and science. The standoff on Terminus takes an unfortunate turn.

Brother Day meets Zephyr Halima—a would-be leader who opposes the Empire. Brother Dusk grows suspicious of Brother Dawn.

The Anacreons and their hostages board the fabled Invictus warship. The bond between Brother Dawn and Azura intensifies.

Brother Day embarks on a journey that no other Cleon has ever attempted. Salvor prepares to make the ultimate sacrifice to return home.

On Terminus, Salvor witnesses how powerful the null field has become. Brother Dawn makes a daring choice.

An unexpected ally helps Salvor broker an alliance. A confrontation between the Brothers leads to unthinkable consequences.