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

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

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.

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.