You generate a null sensory field that erases you and up to one ally per level (with whom you retain contact) from the minds of all other creatures that would otherwise see or remote view (or scry) you. Not only is your presence erased, but also the memory of your initial presence. You and your allies are effectively cloaked and hidden from all other creatures in the vicinity until the duration elapses or you (or an ally) make physical contact with another creature. A successful pick pocket attempt using Sleight of Hand (with a +10 circumstance bonus) doesn't end the effect, but all other contact or influence, including melee, ranged, spell, or power attacks cancels the power.
Once the duration elapses, creatures suddenly become aware of your presence, and moreover, they remember everything that transpired of your actions while and before your presence was erased.