Human boy Mathias was mysteriously teleported into a strange world. After 2 years having no possible way of return, his fish-man friend Detlef invented a contraption that could be his return ticket. Unfortunately Detlef (and the machine) was kidnapped by a rude Knight, who just jump off the sky island. With merchant Sakul and the Kies, Lalbu on his side, will Mathias manage to find his friend or will he discover something that could cause his own world to shatter ?