Jason Segel plays Peter a somewhat lazy musician who specializes in scoring tv shows. He's dating actress Sarah Marshall played by Kirsten Bell. Right in the beginning of the movie, she dumps him causing Peter to drop his towel and to show all of his goodies. I almost pee'd on myself from laughing so hard.

Peter is heartbroken so he heads to Hawaii to get away but guess who is there? That's right Sarah Marshall and she's there with the guy she cheated on him with, rock star Aldous Snow (Russel Brand). Mila Kunis plays a front desk clerk that feels bad for Peter, gets him a great suite and tries to help get him out of his funk. Funny stuff happens from here, Mila Kunis and Peter fall in love and there is a very weird puppet show at the end.

It's a predictable Rom-Com in a lot of ways, has a decent amount of laughs but is too long.