Battle: New York - Day 2
Laura Sommers' therapy is suddenly cut short when New York City is rocked by an alien invasion. Laura is knocked out and awakens to an empty, abandoned city. A mentally unbalanced drifter finds Laura and tries to explain the danger they're in. The rest of the city's population has been enslaved. The only ones who have kept their humanity are those with imbalances in brain chemistry -- that is, mental patients.
Synopsis by Unfair