Jack Keane has the same cartoony feel that I remember from the old adventure games back in the 90's, where the zany adventure was mixed evenly with odd, but logical puzzles and just fun slapstick, clumsy hero humor. In this particular case, you play the part of Keane, a ship captain who has a few too many debts to pay and is looking for work anywhere. So after escaping the thugs who want to take a few pounds from Jack (whether that is flesh or money is up to interpretation), and the Queen asks him to take a secret agent to the mysterious Tooth Island, what could it hurt right?
Unfortunately for Keane, his ship doesn't survive the trip and he is left stranded on the island full of man-eating plants... and to make matters worse, the agent has disappeared. So now it is up to Jack, and a young American woman he meets along the way, to find out the mysteries of the island and stop the evil character known as Doctor T.