The story takes place in Britain in the 19th century, when the Second Industrial Revolution was in full swing. The two most famous power entrepreneurs at the time were Edison (Benedict Cumberbatch) and Westinghouse (Michael Shannon). They regarded each other as their own mortal enemies, evenly matched and tit-for-tat. Edison was the inventor of direct current. He was arrogant, arrogant, ambitious, and had many enemies at the time. One day, a man named Tesla (Nicholas Hoult) invented alternating current different from Edison. In order to seize the market, Westinghouse quickly threw an olive branch to Tesla and invited him to work for him. The emergence of alternating current once again changed people's understanding of electricity and greatly promoted the process of the revolution.