When Cupid's 'love potion' causes a hangin' judge to start setting high-end criminals free, it's up to Kate and Carl to get an on-the-lam Cupid back to Chicago to reverse his potion's' effect on both the judge and a transformed Nick, whose newfound propensity for seeing the good in everyone begins to wear thin on his colleagues.

The Djinn, a Link who makes dreams come true, but at a price, is on the loose in Chicago. If she can grant four wishes to four different masters, she will gain power to enslave the city. Now it's up to Nick, Kate and rest of Special Unit 2 to prevent her from granting her last wish.