First there was Closure. Then it was Forbidden. Now the unsub is Obsessed. The FBI cybercrime series continues after Jess shoots Trevor Marshall in her kitchen. The man responsible for three murdered teens in the Bay area, her parents and her adopted daughter's parents. Ten years before he stalked her without her knowledge. Her father kept it from her to protect her and sent her to the west coast for college. Marshall murdered her parents in his attempt to find her. Ten years later he's successful but Jess is a compelled FBI profiler who hunts internet predators. SSA Jessica Resario thought her life had settled; now there's more at stake. She stepped down as the team's leader to be with her family and SA Mike Turner is promoted. A postcard shows up on her doorstep with the same three words used by Marshall - I Crave You. Mike promises to discover how it was leaked from the sealed case. When another postcard turns up at Jess's beach house, Mike takes the team to the east coast. Only half the team makes it to the beach house. Old ghosts, secrets and with more at stake; Jess is determined to end this obsession and protect her family.