Over two hundred years ago, Commander Charles "Trip" Tucker III died in the line of duty...or did he? It is now early in the 25th Century when an older Jake Sisko gets a friendly social call from Nog with a holoimager containing a story that goes against everything they were raised to believe about the pre-Federation Coalition of Planets, and a possible conspiracy to rewrite history.
The novel establishes a contradiction to the television series by establishing that Tucker did not die in the final episode "These Are the Voyages...", but rather that his death was faked as part of a Section 31 plot to infiltrate the Romulan Empire.
The framing story also establishes that Section 31, the former rogue black ops agency within the Federation, has ceased to exist. The exact circumstances of the fall of Section 31 have not yet been revealed.