Zarya's temper gets her into trouble when she uses her Mysticon powers to settle a personal score.
Piper wants a pet for her birthday, but when the Mysticons get her a gumlump she finds out that she is in way over her head.
The Mysticons turn Zarya into a baby to infiltrate a fairy orphanage to discover the whereabouts of Arkayna's fraternal twin sister from its owners.
Arkayna defies the Astromancers and heads off alone in the hope of finally meeting her long-lost twin. She is surprised when she suddenly aided in her mission by the powerful yet mysterious Proxima. During their journey, the two gradually begin to warm up towards each other. Meanwhile, Necrafa discovers the true identity and whereabouts of the lost Princess of Gemina.
Queen Necrafa herself infiltrates the Astromancer Academy and captures Proxima. With the youngest royal twin now in her hands, the Queen of the Undead intends to use her in order to put her master plan into action. With the immpending annihilation of Gemina close at hand, the Mysticons and Astromancers formulate a plan to rescue Proxima before the egg starts to partially spawn the almighty, destructive Spectral Dragon.
Arkayna and Zarya go in search of an ancient and mighty weapon to stop Necrafa and the Spectral Dragon before the entire realm of Gemina is no more. Meanwhile, Emerald and Piper try to fend them off, with the aid of Nova Terron and his fellow Astromancers, without Proxima who is still deeply hurt and dejected upon discovering that she will forever be the "lowly orphan mage".
Emerald's overprotective mother comes for a surprise visit, but has no idea that her daughter is the legendary Mysticon Knight. As Emerald and Citrine have a mother-daughter outing, Arkayna, Zarya and Piper try to deal with a maleficent eclipse that strengthens dark creatures and send into a vicious frenzy. While Emerald shows her mother around Drake City, Arkayna, Zarya and Piper try to keep her from witnessing anything evil and dangerous, which proves a difficult task, especially with the eclipse looming nearer.
The Mysticons encounter an infant dragon and decide to protect it, but Arkayna and Zarya have different ideas as to what protecting such a creature would really mean.