Linda Danvers has to save her foster parents when their car crashes through a bridge, and Superman arrives to confirm to the Danverses that their adopted daughter is really a Supergirl from Krypton. They pledge to keep her double identity a secret. Superman then breaks into all television broadcasts around the world to present Supergirl to the world. He also takes her on a whirlwind world tour, introduces her to President Kennedy, and presents her to the representatives of the United Nations. Supergirl also receives accolades from the Kandorians, from the Atlanteans, and from natives of alien worlds. Then, leaving her on duty in his place, Superman goes to the 50th Century on a special mission.