It's the last day of the summer holidays and Tilly is determined to make the most of it. She rounds up her brother and sisters, heads to the harbour and together they set sail on a fishing trip around the beautiful Cornish coast. The mackerel season has just started. As the Bunch try to hook some fresh fish for supper and mum and dad waiting at home to find out if they are going hungry tonight, they all look back over the action, adventures and delicious cooking they have packed into the summer.