When an aspiring model disappears, Det. Joe Gentile suspects an online predator may have kidnapped her. And Det. Pam Childs races to find a missing man with mental disabilities before he becomes a victim of street violence.

A woman reports her husband missing the day after their second wedding anniversary; a missing hotel guest is spotted on surveillance video leaving the establishment.

Police detectives investigate the subculture of Chicago's black gay males when a young man leaves a disturbing voice mail message and then goes missing.