"Twenty-Fifth Bam must journey skyward in a mysterious tower if he has any chance of reuniting with his best friend Rachel, even if that means facing his own death. Before mysteriously disappearing into the tower gates before his very eyes, Rachel cautions Bam to forget all about her. Unwilling to lose her, Bam enters the Tower completely surrounded by Shinsu - a divine and magical water, at his own peril. The Tower itself contains multitudes of floors as vast as continents, each one with its unique geography, language and culture. Confronted by skillful tests each step of the way, Bam meets powerful guardians and otherworldly environments, making his quest to the top no easy feat."