A movie I blurrily remember from my childhood

As I said in the title, I remember little so I don’t know exactly what genre it was. I’ll though explain all the details about a scene I remember.

An old-looking woman (probably with Asian features) swims underwater towards a boat where a man and a woman were on board.
And she either causes the boat to capsize or pulls the woman underwater.
Now when both are underwater, it seemed to me like they are saying something to each other while people above are trying to throw something for the young woman to save her.
Then the woman catches it after she probably finishes talking and resurfaces.