When Donny the Unicorn is hunted by a seemingly unstoppable foe, the Powerpuff Girls have to find a way to save him before it's too late.

At a retirement home, Buttercup meets an old woman claiming to be Green Wing, a former superhero. When her former nemesis reemerges, Buttercup teams-up with Green Wing.

Blossom thinks she's a shoo-in for the lead role in a school play. When the list comes out, it's Bubbles who wins the lead role. Blossom, resigned to playing a rock (with no dialogue at that), Blossom tries to sabotage Bubbles' appearance until a Viking queen shows up after being summoned from a book (from which the play's script comes) and takes the male lead, Jared Shapiro, to get him to marry her.

When Bubbles' video becomes viral, she does her best to keep its popularity.

The girls learn to appreciate each others's style after having to each fight solo.

While visiting the lake, Buttercup vows to capture a legendary uncatchable crawdad.

Princess Morbucks throws her 6th birthday party and being the only one not invited, Blossom tries to keep Buttercup, Bubbles and the Professor at home so they won't go.

Getting ready for the new Space Tow Truck movie, Bubbles keeps explaining to Blossom and Buttercup that Bliss exists, the two don’t seem to believe her though. At the theaters, an old-timey character breaks through the screen and the Girls prepare to fight him. Eventually after calling her multiple times, Bliss finally appears and defeats the villain, but the Professor, deeming her too dangerous, stuns her and knocks her out.

Bliss' backstory is revealed, by the Professor, Bliss herself and even Mojo Jojo.

When Bliss can't control her powers, the Girls must help her, whilst dealing with repeated attacks from the Gnat.