Underground, they are greeted by an ancient burial site with large statues, an intricate pulley system and weights designed to keep something captive, and a river of flowing mercury leading into a central pool. Halsey concludes that this is in fact not a burial site, but a prison, designed to keep something or someone in. In his haste, Morton unleashes the pulley system so setting in place a chain reaction whereby the ancient sarcophagus containing the mummified remains of Princess Ahmanet is raised out of its pool of mercury. It is duly raised to the surface and hurriedly packed onto a transport plane bound for England with Greenway, Morton, Vail and Halsey on board.
By now Ahmanet is already awakened in spiritual form and is doing her level best from beyond her grave to wreak havoc on her flight. The first casualty is Vail, who was bitten by a camel spider when they were first investigating the underground chamber from which the sarcophagus was raised. His body is possessed by Ahmanet and he falls under her spell killing Greenway in the process, before turning on Morton and Halsey with deadly intent. Morton puts three bullets into Vail which stops him in his tracks. The plane is then struck by a huge flock of crows which crash through the cockpit windows and into the engines, sending the transporter into a nosedive from which it cannot recover. All those on board are killed, except for Halsey who is parachuted out at the last minute with Morton's help.
The next day, we are in a morgue somewhere in Oxford, with several bagged and tagged corpses from the downed transporter flight. Morton is one of those bagged and tagged corpses, who wakens wondering WTF is going on. Stumbling around the dimly lit room he is greeted by the undead body of Vail (channelling Griffin Dunne as the undead rotting corpse of Jack Goodman in 1981's classic 'An American Werewolf in London') who explains that he has been chosen and cursed by Ahmanet as the replacement vessel for the physical manifestation of Set, and hence her reason for bringing him back to life.
While this is going on, Ahmanet being held captive and drip fed mercury to keep her subdued, possesses one of the Prodigium technicians, that sets in motion as escape plan that sees Morton and Halsey charge through the Museum and out into the streets of London. Ahmanet, having escaped her chained captivity summons to rise from the dead the army of Crusaders to thwart the Prodigium soldiers, hunt down Morton, and at the same time conjure up a massive sand storm to engulf all of London.
With the Dagger of Set retrieved earlier on, Ahmanet only needs the ancient ruby stone laid to rest with the buried Crusader all those centuries ago to to be able to free Set into physical form. Having been discovered by the Prodigium team during their clearing of the site, it is there for the picking by Ahmanet. Reuniting the Dagger of Set with the ruby into the dagger's pommel, a fight breaks out between Morton and Ahmanet with her strength being too much for his mere fragile human form. Succumbing to her overbearing power, he allows himself to be embraced by her, but as a ruse to steal the dagger, and thrust it into his own heart, so allowing his body to be possessed by Set. Now with greater strength than Ahmanet, but still half Morton, he sucks the life out of her so returning Ahmanet to the shrivelled up ancient mummified body that she was.
-Steve, at Odeon Online-