In the Old West, there's nothing strange about a stagecoach getting robbed. But a stagecoach vanishing without a trace, now... Hired to protect the next coach and its important passengers, Lucky Luke finds himself teaming up with a particularly irritated Calamity Jane – something of hers was on the missing vehicle. The two of them soon begin hearing rather unpleasant rumours: whispers that the disappearance was caused by ... a mysterious ghost!