From the creator and presenter of Taskmaster comes a beautifully told story of a young boy’s connection with his grandpa – and a mystery that may come between them.

"Charming and funny and uplifting. I loved it." Greg James

"As delightful as a bucket full of beachcombed treasures." Thomas Taylor

Trader and his grandpa have combed the beach of Bognor Regis for as long as he can remember, and every time they find a beautiful or special stone, it’s added to the treasure collection. But when Trader finds a particularly special pebble, he stumbles on a secret that was supposed to be kept for ever...

Can Trader and his new friend Charlotte unravel the mystery of this treasure, and return it to its rightful home?