When Zoe takes Marinette, Adrien, Alya, and Nino to New York, things are calm until they face a mysterious villain. They suspect that Shadow Moth was behind is, but how did he get to New York? They knew that Shadow Moth was obsessed with obtaining their Miraculous, but when they discover that he is working with another villain obsessed with killing his enemy, the high school students must work with the turtles in order to take them down.
This most likely it takes place in season 4 after the turtles been to space.
The relationship between Marinette and Adrien start to be looking up, but when a tragic incident occurs with Chat Noir, Marinette discovers that she doesn't know everything about her Miraculous power. It's when Chat and Ladybug start investigate their new powers that everything starts to turn downhill and Hawk Moth changes everything.