Weird.. Reminds me of Dark Water
http://en.wikipedia.org/wiki/Dark_Water_(2002_film)
`One evening, after yet another strange occurrence involving the red bag, Yoshimi is drawn to the roof of the building, and while examining the huge water tank she notices that it was last inspected – and thus opened – over a year ago, on the day Mitsuko was last reported seen. She comes to the horrific realization via a vision that Mitsuko had fallen into the tank while trying to retrieve her red bag, and was thus drowned.`