Magneto, the mutant master of magnetism, causes a blackout that affects the entire East coast. He follows up by interrupting all communications satellites. He then broadcast his demands: $100 million in gold in 3 days or he will shut off all power and communications permanently.
Coincidentally a new international communications satellite is launched the next night. Spider-Man arrives to prevent sabotage. He encounters Magneto and discovers he has created a device that amplifies his natural powers.
Even though the launch is successful, Magneto jeopardizes it by encasing Spider-Man in a magnetic bubble and attaching him to the rocket. Spider-Man rigs the satellite with his webbing, guiding it back to Earth. Using the onboard devices, he tracks Magneto to his Easter Island hideout.
During this battle, Magneto is subdued and his power is used to reactivate and return the satellites. Magneto however escapes to fight another day.