It is 2036 and robotic technology has evolved into the realm of self-aware sentient mechanical entities. Just as humans begin to cope with the consequences of their most brilliant creation, there are those who have their own designs for the robots: enslavement and even annihilation. Susan Calvin is about to enter her second year as a psych resident when she hears that her father is dead; he has been brutally murdered in an unprovoked attack. His death sends her on a trail of discovery which will lead her to question everything she thought she knew