A new computer game, Octopus Dare, craze breaks out in the school and everyone is playing it. When Dinah plays the game she wins and gets an invite to play in the games finals. Dinah begins to behave strangely and soon the game is all she can think about.

Dinah arrives at Vulcan Towers, where the final of Octopus Dares is to be played. Lloyd and Harvey worry about Dinah's safety and look to save her.

Dinah begins to work out what is going on and everything hinges on her friends rescuing her.