第15任博士（舒提·盖特瓦NcutiGatwa饰）华丽登场，和拍档RubySunday（米莉·吉布森MillieGibson饰）用TARDIS穿梭不同时空，从英国摄政时代去到未来世界，遇上各种新朋友与新敌人，更要面对史上最强大的敌人。

AstheFifteenthDoctor,playedbyNcutiGatwa,takesovertheTARDISforhisfirstepicadventurehewillbejoinedbyRubySunday,playedbyMillieGibson,asshemakesherdebutastheDoctor’scompanion.TheepisodeseestheDoctorcomeface-to-facewiththemythicalandmysteriousgoblinsashislifecollideswithRubySunday,playedbyMillieGibson.LittleisknownaboutRubySundayasshewasabandonedonChristmasEveasababy.Nowlivingwithhermum,Carlaandgrandmother,CherryherworldisabouttobeturnedupsidewhensheencounterstheDoctorandthetwosetoffontheirfirstadventuretogether