Four Siblings- One Destiny

This is the story of Stonewhisker, Spottedwing, Darkfrost, and Swiftcloud, descendants of the original Clans, of Thunder, Shadow, River, and Wind, who were wiped out by a deadly sickness called Blackcough. Each cat has an ability of the original Clans, Stonewhisker has strong paws, and can swim and catch fish like RiverClan could. Spottedwing has the ability to stalk through the undergrowth without making a single sound like ThunderClan could. Darkfrost has the ability to climb the tallest trees without effort, and prefers the dark, like ShadowClan could. Swiftcloud has the ability to run at very fast speeds and can scent a rabbit five tree-lengths away, like WindClan could. None of them know that their ability's are different than your average cat, until the medicine cat tells the four siblings about their unique powers. Will the littermate's be able to fulfill their destiny and discover what is behind their strengths, or die trying?