A university professor experiences recurring, violent dreams and unexplained physical episodes that coincide with encounters with an attractive newcomer, leading to the suspicion that an alien intelligence is intruding into human minds. The narrative alternates between intimate domestic scenes and escalating psychological horror as the protagonist struggles against involuntary actions and gradually uncovers evidence of external mental control. The story examines loss of personal autonomy, the permeability of consciousness, and the tension between scientific inquiry and irrational fear while moving from atmospheric suspense to confrontations with an invasive extraterrestrial presence.