Can you keep a secret this big? When young Angus MacMarrow finds a mysterious, glittering egg on the shores of Loch Ness little does he realise the excitement to come, especially when it hatches into a legendary sea monster! Join Angus and his incredible friend Crusoe the Water Horse on the adventure of a lifetime as they attempt to outwit the soldiers set on destroying the famous Loch Ness monster and help Crusoe escape to the open sea.