Whats the name of the movie with a girl who goes missing when a bell falls on

[cornicopiaoflove]

her? Theres triangles involved..? There is a movie that's only about 15 years old and it's a story about this group of kids who play ring around the rosie around a little girl under a bell. Something happened and the little girl disappeared before the bell fell on her. Later on, another girl moves in the region and she has to solve the mystery... I remember there being some things about triangles and the little girl who went missing would speak in mirrors... That's all I can remember about it but I would really like to know the name of the movie...