In an attempt to reveal the corrupt high-ranking individuals of an energy corporation, a radical group of eco-activists seizes 300 hostages during an extravagant party held in a towering skyscraper. However, this group harbors a deranged individual whose intentions include executing the hostages as a demonstration of anarchy. The only hope for the hostages lies with an unlikely hero, a delicate young woman who coincidentally finds herself on the outside of the impenetrable skyscraper's windows. She is not just an ordinary window cleaner, but a former special forces soldier, who must now utilize her skills to rescue the hostages and prevent their untimely demise.