Natsu Dragneel encounters Zeref, who is interrupting Fairy Tail's S-Class promotional trial on Sirius Island. However, Zeref defeats Natsu in a duel, leaving him wounded. Despite the encounter, the participants resolve to continue their exam and split up. Meanwhile, Grimoire Heart (the most powerful dark guild of the Balam Alliance) travels to Sirius Island in search of Zeref. After separating from Gajeel Redfox because of an argument, Levy McGarden is attacked by Grimoire Heart members Yomazu and Kawazu. Gajeel rescues her, and the two prepare to engage in a duel.