It takes place in a world of truehumans, truedragons, and dragonlords - beings that have both human and dragon souls and can change from human to dragon and vice versa at will.

The Dragonlords watch over the Five Kingdoms, serving as impartial juries in disputes between kingdoms or involving high ranking nobles as they are seen as above the common interests due to their extremely long lives.

When the Queen of Cassori dies in suspicious circumstances, leaving behind only a young son as her heir, Linden and the two other dragonlords are called in to investigate, and prevent a civil war as two rival human nobles vie for the regency.

As the court infighting escalates, Linden becomes a target of the Fellowship, a secret society of humans who feel that dragonlords should stay out of human politics and who are willing to use black magic to kill the dragonlords if necessary to get their way.

Linden is helped in his investigation by his old friend, Bard Otter, and by the ship captain he meets through him, Maurynna, who may be the only one who can help Linden bring Cassori back from the brink of civil war.