Crown and Cooper are mercenaries hired by a clandestine organization called SATOR with retrieving something called ANNA and prevent it from being used by OPERA, this leads them to discover Inverse, Time Travel, and many more. A Doomsday weapon sent by the future to prevent a doomsday in the Past.
All the names you will see are Codenames of the various agents of SATOR, OPERA, and Centralis.
There are also several details that are linked to the story and also future predictions.
Hint: Decipher the Lamp.