In the ominous night sky, Finn Sheppard (Ian Ziering) and his ex-wife, Ai Bo (Tara Reid), took a flight to New York. Unexpectedly, they encountered a fierce sharknado on the way. Fierce sharks crashed into the cabin and many people died in the disaster. In the moment of crisis, Sheppard turned the tide and finally succeeded in forcing the dilapidated plane to land on the ground, but Ai Bo was left with lifelong disability. He warned the police in shock, predicting that the sharknado would soon hit Manhattan. Before long, the bloodthirsty storm came, and Finn's sister, Ellen (Kari Wuhrer), and her family were in this bustling metropolis. The civilians immersed in the carnival of the stadium were completely unaware that death was approaching. In order to save his family, Finn bid farewell to Ai Bo and broke into the ill-fated Manhattan without hesitation...