in plain sight
From Longman Dictionary of Contemporary Englishin plain sightin plain sight American English if something is in plain sight, it is easy to see or notice, especially when it should be hidden Don’t leave your valuables in plain sight. → plainExamples from the Corpusin plain sight• I couldn't believe they'd left the drugs and needles right out in plain sight.• Thou shalt not leave illegal things lying around in plain sight.