The participants will be divided into groups. One group will remain at the base location while the remaining groups will be taken to different secret locations nearby. Each group will be supplied with a two-way radio and a booklet containing various different pieces of seemingly random information.

The information in each booklet will not make any sense on it's own until they combine it with information from the other booklet's and eventually all will become clear. As they solve each section, the final solution will become clearer until the puzzle is complete.
Once the code has been cracked and the final solution reached the groups will be re-united back at the base location.

The final answer to the puzzle can be a telephone number or word relating to a lunch location, venue or activity they will be taking part in later.