Marinette has become the official keeper of the Miracle Box. But things couldn't be more bleaker for our heroine's love life. Unwilling for Ladybug to return his affections, Adrian is pressured into a dating relationship with the strait-laced Kagami Tsurugi, a girl with an affinity for the martial arts. To take her mind off him, Marinette finds catharsis in a dating relationship with Luka, who lives on the second floor of his home.

In the meantime, Mr. Agreste (Hawk Moth) finds himself even more obsessed with obtaining the other Miraculous more than ever; and after fixing the broken Peacock Miraculous, has obtained even more power to try and get what he wants at the cost of everything he holds dear.