....I did shoot in raw. I think its way over exposed and beyond help le. i tried brightening it but only making it look posterized.
Not sure which RAW converter software used by thread starter. Generally, this situation should be dealt with mix-and-match of exposure value adjustment, shadow-and-highlight recovery, level curve adjustment (and control point adjustment, if done in Nikon CaptureNX2). Experimentation to achieve desired result is essential in this instance.