Jessica returns home after college to find that her single mother, Tracy's new boyfriend, Paul, is also moving in. Jess soon suspects he is not who he seems, and she sets out to prove that he's the wrong Mr Right.

The moment Riley meets Chris, she thinks he is handsome, charming and affectionate. He seems perfect, but after a party at his house, Riley sees that Chris has a darker side.

No terceiro filme da franquia de animação, agentes enfrentam um inimigo determinado a contaminar o mundo com um vírus mortal.