…in it

So a guy with blonde/brown hair (white) met a girl (white) with blonde hair who was sorta a local I think in hawaii or some beautiful beachy place like that. He ends up falling in love with her or something like that and she takes him to this cliff with a waterfall where they jump into the water. She dives down and pulls up a chest from the bottom of the lake that has a bunch of things that locals put in it and they end up adding something but I forget what. This was probably around 2010.