Pho­tog­ra­ph­er Lisa Kris­tine trav­els the world doc­u­ment­ing the unbear­ably harsh real­i­ties of mod­ern-day slav­ery. She shares haunt­ing­ly beau­ti­ful images — min­ers in the Con­go, brick­lay­ers in Nepal — that illu­mi­nate the plight of the 27 mil­lion souls enslaved worldwide.