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The Master of Lies mainly tells the story of professional liar Roy Courtney (Ian McKellen) catching a target on the Internet: the rich widow Betty McLeish (helen mirren). The widow gradually opened her heart to the liar and welcomed him into her home. However, the swindler found himself beginning to really care about the widow. He should run away with the money and make the most dangerous betrayal in his life.
The plot has a cat-and-mouse style, just like an elaborate Russian doll. Every detail in every scene deserves the audience's attention, from precise and meticulous dialogue to works of art on the wall, to the choice of indoor wardrobe, to some indoor color matching. These details all imply the development of the plot.