Sully the grey seal pup has just been born and already hes in trouble. Life's a beach... a cold, wet and windy one but it's where he must learn all he needs to know in just four short weeks before heading out to sea alone on the journey of a lifetime. From being abandoned to getting stranded on a rock in a storm, Sully's infanthood is one full of surprises. Will he ever make it off the beach to become a wonder of the sea able to dive deeper than 300 metres?