We all have our share of secrets we try to keep hidden from the public, no matter how innocent we may try to be. Trying hard to keep them hidden could create our own personal jail and then will be too late for us setting anything free.
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I've developed this purely in Photoshop CS3, and used photo reference for the Angel's pose. I tried to keep the composition simple with not too many details to over-complicate things and keep the focus on the Angel.
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Here are some closeups:
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You can also see the step-by-step process at:
http://www.lorisarts.com/portfolio/hidden.htm
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I hope you like it.
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Loris_