Wasif arrives through the Stargate after an astonishing experience, followed in short order by Captain James Beal and Catherine Langford. They quickly make a series of discoveries about their alien environment: the D.H.D., apparently capable of dialing the Stargate quickly and easily; the fact that the address they used to reach this world won't get them back; and the three moons of Abydos hanging in the daytime sky out the window. They are definitely not on Earth any more.

They continue to explore the temple they have gated into, weapons drawn, while Catherine searches Brücke's journal for another gate address. Soon they come upon the throne room where Brücke's team encountered Aset (Episode 3) – complete with the German Gunter still lying dead on the floor.

But they haven't noticed a young Abydonian man in the building, who was studiously washing the Stargate by hand moments before the came through. Wasif has only found the water buckets left behind by the boy – who he is keeping an eye on them from the shadows.

While Cat and James argue, Wasif stumbles into a threat unlike any he has ever seen: Serqet, an alien warrior, growls back at him from the temple shadows. But when she knocks him out they hear the sound, and James attempts to lure out the still unseen hostile. The warrior approaches with a staff weapon at the ready and Catherine shoots at her, grazing her arm. Serqet fires back a powerful blast from the alien weapon, and James jumps in to engage her in hand-to-hand combat.

Serqet is highly skilled and soon has James on his back. When he grabs at her wrist Catherine notices that a device activates a set of rings, which descend from the ceiling directly behind Aset's throne. As the three continue to fight Catherine loses her hair pin on the floor. It is clear that Serqet is the superior warrior, and that they have little hope of defeating her by any conventional means.

The fight takes them behind the throne, where a revived Wasif leaps out and tries to fire his weapon at the alien – but it doesn't work. She throws him to the ground and turns her staff on a defenseless James. With the warrior momentarily distracted Catherine hits Serqet's wrist device with a stick, activating the rings right on top of her. The alien is transported away.

Catherine, James, and Wasif regroup ... only to be surprised when the Abydonian reveals himself to them. Catherine tries to communicate with the boy, who is trying to convince them to follow him. The rings activate once more and they make a hasty retreat, with the Abydonian in tow.

Serqet returns – picking up Catherine's pin.