When his Granny comes down with a mysterious ailment, Franklin and his friends must search for the treasure of Turtle Lake. This is said to be a talisman that can cure the illness.When his Granny comes down with a mysterious ailment, Franklin and his friends must search for the treasure of Turtle Lake. This is said to be a talisman that can cure the illness.When his Granny comes down with a mysterious ailment, Franklin and his friends must search for the treasure of Turtle Lake. This is said to be a talisman that can cure the illness.