With SG-1 trapped on Klorel's ship. It seems that Earth is doomed. As the episode begins we realise that a second Pyramid Ship has entered Earth's solar System. It is Apophis' ship. The team realise that the explosives they have planted on Klorel's ship won't be enough to destroy this and Apophis' ship together. However, SG-1 are freed by Master Bra'tac when he ignores an order from Apophis to kill SG-1.
General Hammond, is ordered to fire on the orbiting ships. The missiles are fired but cause no damage, as their defense shields were up. Bra'tac's original plan no longer works: he intended to lead his men against Apophis in Klorel's name, hoping to incite the two Goa'uld into fighting with one another. But with SG-1's presence (and attack on Klorel), a new plan must be devised. The team captures Klorel's ship, and Bra'tac maneuvers it closer to Apophis' vessel. The group then uses the transport rings to move to Apophis' ship.
Daniel is wounded as asks to be left behind while his friends jump through the gate. He will guard their passage through.
After escaping Apophis' clutches, the team moves to the chamber in which the energy shield is generated. A couple of grenades disable the shield, and Bra'tac prepares to die in a heroic fashion. O'Neill has other plans. With help from Bra'tac they locate the ship's glider bay, and escape the vessel. Klorel's ship explodes in a glorious ball of fire, taking the crippled ship of Apophis with it. There are two brilliant flashes in the night sky, and Earth is saved.
Apophis and Klorel leave through the transport rings, and are presumed dead. Daniel finds a sarcophagus, and uses the Stargate on board Klorel's ship to escape to Earth's alpha site (after which he dials home to Earth). And O'Neill, Carter, Teal'c and Bra'tac are picked up in orbit by the United States shuttle Endeavor