In the exciting season finale of Alert, a tense situation unfolds when a limousine transporting a group of teenagers to their prom is abruptly hijacked. Among the captives is the son of a prominent senator, intensifying the urgency and stakes of the episode. As the Missing Persons Unit delves deeper into the case, they uncover a complex web of emotions and relationships. It appears that the true target of this dangerous plot may be linked to someone with a very personal motive: the ex-girlfriend of one of the young victims.