"Bye-bye, little… actually, that's your line, isn't it? Sorry." Ladybug stared at the man in front of her. Tall. Shaggy, but not unkempt blond hair. Oh yeah, and he was wearing a Ladybug costume. "Who - who are you?" "Oh, right, sorry." He drew himself up to his full height and proudly announced, "My name is Adrien Agreste, and I've come from the future to rescue you!"

School's out, Master Fu is dying, and the responsibility of the Miraculous Box falls fully on Marinette's shoulders. Ever the multi-tasker, she's sure she can balance being the Guardian with the rest of her life, but a new menace arrives and tests her resolve. With the fate of the world in her hands, it's a wonder she has time for two boys who seem determined to make her blush...

Marinette is losing her battle with Lila one classmate at a time. Meanwhile, an act of carelessness threatens to change the Agreste family's life forever. Marinette and Adrien both find themselves struggling against forces outside their control. When those forces collide, their relationship hangs in the balance.