Through the whole episode, Anko's cursed Mark s burning which is why she thinks that Orochimaru is around. She's told that the last time Orochimaru was at the island was two weeks ago.

How Naruto Neglected Anko’s Promising Potential The First Receiver of Orochimaru's Curse Mark Anko isn’t one of the main side characters who played a massive role in the protagonists’ lives.

Anko passed on the information to the Third Hokage, ordered 2 Anbu teams to be deployed and ventured forth in search of Orochimaru. She stumbles upon his clone who reactivates her dormant Cursed ...