During a meteor shower in Midvale, Supergirl notices a Kryptonite meteor. Determined to find an antidote to Kryptonite, she coats the meteorite in lead and then recovers it. She then uses a small chemical laboratory in the orphanage to do experiements on the Kryptonite. Unsuccessful, she discards the modified Kryptonite, now known as X-Kryptonite. Streaky then performs a series of super feats, until Supergirl takes notice. She then romps with the cat in outer space, until his super powers wear off and he begins to fall. She quickly saves the now depowered cat.