The sections set in the 51st Century in particular contain references to the Doctor Who serial The Talons of Weng-Chiang, showing the war that villain Magnus Greel had started before trying to escape through time.

The TARDIS crew arrive in the Kremlin Museum, looking for a locket that may help to reveal the nature of Sabbath's plans.

In the present day, Colonel Grigoriy Bugayev (of the Russian branch of UNIT) is investigating the thefts, and suspects corrupt businessman Vladimir Garudin.

The Doctor and the future soldier arrive in 5000 with a painting of a Russian noblewoman, which his captor insists on taking to his commander, Lord General Razum Kinzhal.

Kinzhal himself has been captured by enemy forces, but manages to complete a daring escape that leaves him in the Arctic wilderness with his second-in-command, Angel, who loves him dearly.

In 1812, as Alexander Vishenkov prepares to head off to face the French with his friend Captain Victor Padorin, he is given the diamond locket as a token of affection by Dusha.

Trix awakes to find herself on the planet Paraiso with a woman named Aphrodite, and her soldier recovering in a villa.

She heads to 5000 to try to retrieve it, but she was mistaken: the soldier has returned to 1812 to force Aphrodite to take him home, being unable to work the controls of the time machine pool.

Aphrodite explains that Dusha and Kinzhal are two halves of the same being, exiled for breaking their society's laws and having a child.

Trix arrives too early, and ends up having to pose as Kinzhal's aide whilst she awaits what she assumes will be the return of the locket.

The Doctor arranges for Dusha to arrive in the future in Angel's body, and also obtains the diamond he needed to find the true nature of Sabbath's masters.

As Burgayev's raid on Garudin's headquarters is successful, the industrialist commits suicide, and the time travel equipment is confiscated and destroyed.