Emerson Grahams nights as a cab driver are filled with annoyances and inconveniences, but until tonight, never attacks and disappearances. After picking up a mysterious passenger her evening goes from working a job to performing a quest as they must race against the clock to defeat a force of evil. The meter is running.

上世纪40年月早期，德国攻占英国前夜，瑞士的里克特男爵向英国年夜使凯利建议采纳和平立场，由于抵当纳粹无异于以卵击石，而凯利却谢绝接管他的建议，并传播鼓吹英国将抗战到底。英国那时的处境极为邪恶，陆军在方才竣事的法兰西战争中损掉惨痛，英国本土仅剩下780门火炮、160门反坦克炮和200辆坦克。空军也在战争中遭到重创，损掉了约1000架飞机，牺牲了435名富有经验的飞翔员。英国皇家空军大将道丁已发觉到一场年夜战燃眉之急，他需要更多的飞机和飞翔员。不久以后，丘吉尔辅弼颁布发表年夜不列颠之战正式开战。