Traveling by secret railroad, Becky and Drake accompany an order of mysterious priests on a quest to bury General Hume’s body in holy ground. But, when malevolent forces spurred by a sinister necromancer stage a terrifying attack on the train, Drake vanishes without a trace! Alone, Becky continues her journey to a secluded mountain fortress where she discovers how deeply her fate is entwined with that of the Sixth Gun