Once upon a time in the magical kingdom of Miraculous there lived a beautiful and compassionate maiden called Marinette. One day her great beauty won the heart of the handsome prince Felix so the two made plans to marry and lived happily ever after...or so they thought. This fairy tale was quickly put on hold when Felix's evil father King Hawkmoth banished Marinette to a strange and terrifying land, a place with no magic, no fairy godmothers, no princes, and no happy endings. A place called Paris France.
There she befriends Adrien Agreste a kind young lawyer and single father who his struggling to raise his daughter Emma alone and commit to a relationship with his fiancé Bridgette. He reluctantly let's the girl stay with him until her "Prince" finds her. When Felix learns what happened to Marinette he and Plagg crossover to the other world to save her but Hawkmoth determined not to lose his throne because that's what would happen if his son ever married. Sends his faithful servant Nathalie there to poison Marinette.
Now Adrien has to get them back home before time runs out and when it all comes down to true love, who will Marinette pick?