Already thinking ahead to the next rugby season, James and Matt decide to spend their summer holidays in training to improve their fitness. On only the second day, however, their swim in the local river leads them to a waterfall whose cavernous depths take them out into another time and place.

Here they meet strange folk - strange yet very familiar folk they know only from books and films. Could they really be in Sherwood Forest talking with the legendary Robin Hood and his faithful band of brothers?