In the Daily Planet building, Editor Perry White reveals to his two best field reporters, Clark Kent and Lois Lane, that an anonymous figure has mailed another threatening note, threatening to use his "Electrothanasia-Ray", to the Planet. White assigns Kent to help Lois follow up her lead, but Lois instead insists that she'd "like the chance to crack the story on [her] own".
Lois takes off in a private plane to an undisclosed location on the top of a mountain, where the villain's secluded lair/laboratory is located. He is preparing to fire his futuristic weapon (perhaps a particle beam or death ray), until his pet vulture spots Lois' aircraft and alerts him. Upon her arrival, Lois is kidnapped, bound, and gagged, as the scientist boasts to her about the success of his plan, and then demonstrates the weapon's power by aiming it at a bridge and destroying it. While listening to the radio, Clark and the other journalists learn of the coming disaster, as the police alert everyone to stay in their homes. Instinctively, Clark steps into a storage room and changes into Superman before flying away.
The Mad Scientist (Jack Mercer) then has the beam weapon weaken the foundations of the Daily Planet skyscraper, causing it to tip over. Fortunately, Superman arrives in time and prevents the structure from crashing into neighboring buildings or falling to the ground, successfully restoring the skyscraper to its upright orientation.
Superman then pushes the death ray away from the base of the skyscraper and attempts to fight it back to the source, but the scientist increases the weapon's power, which also sends erratic "pulses" of energy Superman's way. However, Superman remains determined to fight it, persevering against the beam and punching out each pulse as they come, gradually pounding the beam back to the scientist's lab. Seeing that the beam has been overpowered, the horrified Mad Scientist increases power, but Superman uses that against him