Team 7 (Naruto, Sasuke, and Sakura) joins forces with Kabuto to reach the tower. They encounter a disorienting Genjutsu set by Rain Genin, leading to a confrontation with a swarm of clones.
Yamato explains the goal is to capture Sasori's spy, which could lead them to Orochimaru and, ultimately, Sasuke. Naruto Episode 35
"An Unnecessary Addition" Arc: Tenchi Bridge Reconnaissance Mission Team 7 (Naruto, Sasuke, and Sakura) joins forces