Taken on by the enigmatic Dr. Hema Kundu as a specialist task force, the Fundoo 4: Fatima, Mani, Amay and Piyali travel to a secret base in the Himalayas for their latest adventure. There they undergo tests to understand the nature of the strange changes that affected them as a result of an accident in cyberspace. They also have a secret mission to discover the identity of a spy at the base who is dispatching vital information to a shadowy criminal organization called The Syndicate but soon, the kids realize that there are other mysterious things going on and time is running out.