After several missions, including a major one in the Land of Waves, Kakashi allows Team 7 to take a ninja exam, enabling them to advance to a higher rank and take on more difficult missions, known as Chunin Exams. During the exams, Orochimaru, a wanted criminal, invades Konoha and kills the Third Hokage for revenge. Jiraiya, one of the three legendary ninjas, declines the title of Fifth Hokage and searches with Naruto for Tsunade whom he chooses to become Fifth Hokage instead.