PC's have a contact who works at a powerful company who is looking to make a quick buck and tips them off... or convinces them to help him... they can make Millions... Perhaps they are forced to help with family members taken hostage or something...
He tells them word in the company is they have some new break through technology... or discovery and he knows an over seas buyer for it or underworld boss... should they be able to get it...
It is scheduled to be moved to a more secure building later that week for final testing and storage... a lot of people seem interested in it...
The PCs and some Non-Player Characters can plan the heist... maybe breaking in to get it through the sewers or a nearby building or otherwise over coming security...
What they don't know is this technology is "stolen" from Metropolis... or too advanced and the Lictors want to acquire it to crush it...
The company is targeted by a domineering Lictor... Who will stop at nothing to get it back... or stop it. The Lictor runs the parent company it will be taken by or has bought the rights to it...
and may start disposing of Humans involved with it including attempts on the PCs friend they can get tangled up in.
Perhaps the technology can help to awaken humanity if fully developed in some regard or presents a threat to the Illusion in some manner... and the buyer is an agent of Malkuth... or Conjurers... an Awakened individual...
PCs can be given an opportunity to try out the new technology... drawing the attention of Techrones or some Time/Space creatures... depends on what the technology is...
Of course to complicate things the contact with the buyer can double cross PCs... in some way... leaving them to deal with the other parties involved on their own...
Some Ideas For The Technology:
A device that counter acts the laws of physics as we humans know them...
Maybe it is a virtual reality game with elements of the truth in it about the Illusion...
Maybe it is a treatment that elongates life dramatically or a cure for cancer...
MAybe the device is a lens that allows the user to see through the Illusion... (Or Some Other Recovered Artifact)
Alternative:
Maybe instead of a company it is a museum that uncovered a relic that predates the age of the earth... with secrets from an earlier time in Metropolis... perhaps a cult is after the object in this case...
Maybe it is plant-life or creatures from Gaia... that threaten to over-run the Earth if allowed to prosper...
Conclusions:
The end is up to you and your PCs... and the way it plays out but...
End Up Stranded In Metropolis Or Elsewhere... Become Proto-Techrones...
Become Agents Of Malkuth... Or Captives Of A Lictor/Archon
Hunted Theme By One Or More Adversaries To Follow PCs Throughout Other Adventures...