Hari finds himself trapped in a mysterious prison. An assassination attempt leaves Day shaken. Gaal and Salvor devise an escape plan.

The Empire recruits Bel Riose to investigate the resurgent Foundation. Hari leads Gaal and Salvor to a desert planet.

A mysterious new pirate with terrifying abilities—known as the Mule—catches the attention of the Foundation and Empire.

Gaal and Hari advance their plans on Ignis. Empire grapples with an unforeseen prediction. Pritcher enlists help to investigate the Mule.