Many centuries ago, on the planet Aries, there lived a boy named Alex Kidd. For seven years he lived on Mt. Eternal studying Shellcore, an ancient art that makes one strong enough to breaks rocks into pieces. One Day, as he was leaving the mountain for his spiritual homeland, he encountered a dying man who told him that the peaceful city of Radaxian was in grave danger. Before taking his last breath, the man gave Alex a piece of a map and a medallion made of Sun Stone. So to relolve the mistery, Alex decided to search across The Miracle World for the answers.