Construction worker Douglas Quaid, experiences recurring dreams about Mars and decides to use services of company called Rekall, to finally visit the planet.
Durign the colonization of far planets the settlers from Earth are attacked by alien species, so human kind prepares a military expedition to take care of the enemy.
John Connor finds the information about new weapon - the cyborgs using the living tissue. Since that point no one will be able to tell who is human and who is not.