Lukan Gardova is a cardsharp, academy dropout, and―thanks to a duel that ended badly―the disgraced heir to an ancient noble house. His days consist of cheap wine, rigged card games, and wondering how he might win back the life he threw away. When Lukan discovers that his estranged father has been murdered in strange circumstances, he finds fresh purpose. Deprived of his chance to make amends for his mistakes, he vows to unravel the mystery behind his father's death. His search for answers leads him to Saphrona, fabled city of merchant princes, where anything can be bought if one has the coin. Lukan only seeks the truth, but instead he finds danger and secrets in every shadow. For in Saphrona, everything has a price―and the price of truth is the deadliest of all.

Winter has come early to Korslakov, City of Spires, and Lukan Gardova has arrived with it. Most visitors to this famous city of artifice seek technological marvels, or alchemical ingenuity. Lukan only desires the unknown legacy his father has left for him, in the vaults of the Blackfire Bank. But when Lukan’s past catches up with him, his key to the vault ends up in the hands of a mysterious thief known only as the Rook. As Lukan and his companions race to recover the key, they soon find themselves trapped in a web of murder and deceit. In desperation, Lukan requests the help of Lady Marni Volkova, scion to Korslakov’s most powerful family. Yet Lady Marni has secrets of her own. Worse, she has plans for Lukan and his friends. Plans that involve a journey into Korslakov’s dark past, in search of a long-lost alchemical formula that could prove to be the city’s greatest discovery . . . or its destruction.