A trusted family friend picks up Jan after school to go horseback riding, but as nightfall looms and they're still not home, what seemed like a casual afternoon slowly turns nightmarish.

The search for Jan escalates as the Brobergs call in the FBI; Jan is tasked with a disturbing life-or-death responsibility.

The Berchtolds and Brobergs grow closer, but as Mary Ann and the girls fall under the spell of their fun-loving neighbor, Bob sees him as a threat.

The Brobergs fight to restore normalcy as they prepare to face B. in court; Jan's anxiety about the mission snowballs with time; Mary Ann's questions about Mexico and growing disconnect with Bob lead her to a gut-wrenching decision.

When the Brobergs' marriage is thrown into jeopardy, Bob and Mary Ann must face the terrible consequences of their mistakes; B. strengthens his sinister hold over Jan.

Jan goes missing again and the FBI's hands are tied, but the Brobergs press on in their search for answers; the case takes a heavy toll on Pete as he digs deeper into B.'s past; Jan learns to blend in a strange new environment.

Mary Ann prepares for a high-stakes showdown; Pete works double time to find Jan, disobeying direct orders; worn down by fear and secrecy, Jan nears a breaking point.

With Jan home, Bob and Mary Ann take steps toward healing, but as her 16th birthday approaches and the mission reaches its do-or-die moment, Jan prepares for the worst.