When his only friend Rachel leaves him to enter the tower that is rumored to grant wishes, Bam desperately pursues her. However, he is prevented from going with her by the rules of the tower and is instead entered into a test that will give him the right to enter. Princess Yuri notices Bam’s arrival and is interested because irregulars such as him are usually powerful trouble makers. She lends him a famous sword called the Black March to give him a better chance of winning.
Despite his lack of survival skills, Bam’s determination wins him the test and a new group of friends that includes the genius light bearer Koon Aguero and the spear bearer Rac, but Rachel has started climbing without him and Bam must pass the tests on each floor to climb after her.
