Tony Stark finds himself as a de-aged Loki Odinsson's temporarily designated parental figure, through no fault of his own. Responsible superhero co-parenting doesn't just involve feeding, housing and clothing a tiny Asgardian, it involves rubber ducks, transdimensional vortexes at bathtime, fruit parties, pictures of robots that draw other robots and hoverboards (eventually), as the team keep Loki safe while they look for a solution.

One rainy afternoon Tony gets home to find a wet-haired child in an over-sized bathrobe sitting on the penthouse couch, watching cartoons. “Um, what,” says Tony. “Oh, hey,” Harley says, noticing him. “JARVIS showed me where to go. He told me to leave my clothes in the bathroom so they could dry, and said I could borrow one of your bathrobes. You have a really big TV, you know that?”