USB sticks, hidden across the world, hold the key to unlocking Muse's latest track, United States of Eurasia.
Inspired by the song's title, Muse have given their fans a challenge spanning Berlin, Moscow, Dubai, Hong Kong, Tokyo and beyond.
Muse fans will only be able to hear United States of Eurasia before the release of forthcoming album The Resistance if they collectively solve the clues contained on USB sticks. Finding these sticks - scattered across several European, Russian and Asian cities - is just the first challenge. Each one contains a code that must be cracked on special website ununitedeurasia.muse.mu.
As of 10.50am on 17 July the Paris, Berlin and Moscow codes have been activated, with the Dubai USB found but its puzzle not broken.
The Resistance will be released on 14 September.