Japanese title: Sennyū! Dokuhebi no ajito (潜入!毒蛇の巣窟)
Sai shudders when he finally meets Sasuke face to face in Orochimaru's hideout. The list that Sai gave to Orochimaru lists the members of the Anbu Black Ops, the corps under the direct control of the Hokage. Sai stays with Orochimaru in exchange for some valuable information, but until he can be trusted completely, he is given a room where he will be under house arrest. When he is alone, Sai cautiously looks around and begins to summon a book.