ThisepisodefindstheDoctor(JodieWhittaker),Yaz(MandipGill)andDan(JohnBishop)in19thcenturyChina,whereasmallcoastalvillageisunderthreat–fromboththefearsomepiratequeenMadameChing(CrystalYu)andamonstrousalienforcewhichsheunwittinglyunleashes.WilltheDoctor,YazandDanemergefromthisswashbucklingbattlewiththeSeaDevilstosavetheplanet?

这一部讲述的是罗伊鲍尔（杰弗里多诺万饰）死亡后刚被冥界警局招募的故事，他获得了重返人间的机会，但同时也不得不封印被开启的地狱之门，以保护世人的安全。