This movie is a very nice and also adventurous movie! In this, Nobita and all the friends go in the seas in the search of a treasure on an island but in betwenn bad things start to happen- They all get travelled back in time.-Nobita gets lost-And.. Doraemon looses his pocket.
Then they all go in search of Nobita with a team of pirates who are also in search of a lost boy-Jack.
Nobita meets Jack and they get together.Finally they make the main villan of the film - Cash get arrested and safely travel back to their own time.