Horizon is a mysterious planet which neither Zen nor Orac can shed any light on. After teleporting down the crew are captured by Federation guards. Avon considers leaving the planet by himself with the Liberator.

The Liberator is ambushed by several Federation ships. Travis captures Blake's cousin. He claims to want to join Blake's crew.

In their quest for information on the location of Star One, the crew search for a member of the royal family of Goth who has an amulet containing a brain print.

The crew search for a new home base on the planet Obsidian, whose volcanic outbursts -- and a nuclear device buried in the planet's core by its inhabitants -- protect the planet from being overtaken. Servalan employs an elaborate plan to take control of the Liberator.

Dayna meets an old friend, Justin, to seek help with synthesizing an antidote to the Federation pacification drug. Servalan learns of Scorpio's visit to Justin's planet and of the genetic research he is performing there.