We organize a new challenge in conjunction with ECCV 2018. The challenge centers around the problem of precise localization of human faces and bodies, and accurate association of identities. It comprises of three tracks: WIDER Face aims at soliciting new approaches to advance the state-of- the-art in face detection. WIDER Pedestrian has the goal of gathering effective and efficient approaches to address the problem of pedestrian detection in unconstrained environments. WIDER Person Search presents an exciting challenge of searching persons across 192 movies.