Touching down in Denver, my thoughts were on Louisa. The mysteries surrounding my life as well as the possible contents of the lockbox were momentarily forgotten. All that mattered was getting to the medical center and seeing my best friend.

Sterling reassuringly reached for my hand resting on my jean-clad legs. After our shower, we’d both changed into casual clothes, me in a t-shirt with jeans and a jean jacket and Sterling in dark blue jeans and a white button-down ...