Wii

Hi All,
first time I've used this site so apologies if I'm asking this question in the wrong place! Trying to identify a game my daughter has asked for for Christmas. Its a Wii game thats been advertised on tv which shows that somewhere in the game a bag is in a lake, a girl doesn't know how to get it out and her mum suggests using a life ring nearby. Any ideas?

Additional details - 11/10 9:48AM

done a bit more subtle questioning (its a challenge for Father Christmas really!). Apparently the tv ad shows a girl playing her wii, her mum is also in the room. the girl is a playing the role of a girl in the wii game. In the game a guy spots a bag (apparently looks like a brown paper parcel) in a lake and asks the girl how he can get it out. the girl playing the game doesn't know how to help him get it so her mum suggests she directs him to a life ring that she'd walked past. think that was the full ad so know no more....