Sam and Jess are delighted to be on holiday and back at Talltrees in Yorshire with Gran and Jake the border collie, Their holidays in the North Yorkshire Moors have a habit of turning into nail biting adventures filled with perils and not a little intrigue.  This holiday, Jess is determined to see the seals in Misty Cove and adventure is far from her thoughts. Sam on the other hand is always up for a good adventure.  Jess, Sam and Jake soon realise that all is not well when they stumble upon some very suspicious goings on. The trio soon find not only the seals but themselves in mortal danger.  Will Jake be able to help them one more time, or will it be curtains for them all at Misty Cove? Join the intrepid trio in their seventh and final adventure on the North York Moors to find out.