"Detecting a disturbance under Metropolis, Superman goes under ground to quell seismic activity, and uncovers an alien ship. The ship explodes upon it's contact with him, and later when he spots some crooks, he realizes that his conventional powers (except for flight and invulnerability) have been replaced with a new power: rainbow beams that he shoots out of his hands which cause the crooks to instantly surrender. What Superman soon learns is that his hands actually shoot a miniature version of himself that can utilize all his lost powers.
After a series of assists, Superman can't help but feel some resentment towards the "Superman Proxy", as it has his full powers and is getting all the press attention. Later, the Proxy ends up acting on it's own stopping crimes before Superman becomes aware of them. However, when a group of criminals tries to kill Superman with a chunk of Kryptonite, the Proxy ends up sacrificing itself by knocking it into the ocean where it can't harm him. With the Proxy being deceased, Superman gains his original powers back and gathers up the crooks. "