Ep 24. Catalyst (Heroes' Day - Part 1)

Miraculous: Tales of Ladybug and Cat Noir season 2 episode 24, titled "Catalyst (Heroes' Day - Part 1)," follows the story of Marinette and Adrien, superheroes Ladybug and Cat Noir, as they face their toughest challenge yet. As Heroes' Day approaches, tensions in Paris rise as the supervillain Hawk Moth plots his biggest scheme yet.

Marinette and Adrien struggle to balance their superhero responsibilities with their daily lives as high school students. But when they learn that Hawk Moth has a new plan to acccumulate more power by taking control of all the superheroes in Paris, they know that they need to act quickly to save the day.

Meanwhile, other superheroes in Paris are also preparing for Heroes' Day, including Carapace and Rena Rouge. However, when they begin to act strangely under the influence of Hawk Moth's powers, Ladybug and Cat Noir realize that their struggle has only just begun.

With time running out, Ladybug devises a plan to stop Hawk Moth's latest scheme and save the superheroes of Paris from his control. But as the stakes get higher and the danger increases, Marinette and Adrien must work together with their friends and allies to defeat Hawk Moth and his minions.

As the first part of the two-part season finale, "Catalyst" sets the stage for an epic battle between good and evil. With plenty of action, suspense, and drama, this episode is sure to keep fans on the edge of their seats as they wait to see what happens next.