Construction worker Douglas Quaid discovers a memory chip in his brain during a virtual-reality trip. He also finds that his past has been invented to conceal a plot of planetary domination. Soon, he\'s off to Mars to find out who he is and who planted the chip.
Veteran buttoned-down LAPD detective Roger Murtaugh is partnered with unhinged cop Martin Riggs, who -- distraught after his wife's death -- has a death wish and takes unnecessary risks with criminals at every turn. The odd couple embark on their first homicide investigation as partners, involving a young woman known to Murtaugh with ties to a drug and prostitution ring.