At night, Jerrica Benton is transformed into her alter-ego Jem with the help of her totally rad hologram-projecting red star earrings and the computer Synergy. Jem is the lead singer of Jem and the Holograms, who battle the evil band the Misfits.
It's Showtime, Synergy!
Synergy was created by Jerrica Benton's father, Emmett Benton, owner of Starlight Music. He had a vision after the death of his wife, Jacqui, and created Synergy in Jacqui's image. Synergy had the capability to turn anything into a 3D holographic image. Emmett was about to die, and created Synergy as a sort of mother to Jerrica and her sister, Kimber. He also created clothes, a car, and musical instruments for the girls. After Emmett's death, Synergy revealed herself and Emmett's gifts to Jerrica.
Jemstar Earrings
The hologram transmitter earrings in the shape of red stars were meant to be a birthday gift from her father, but he died before he was able to give them to her. Jerrica mysteriously received them in the mail later. The earrings are a direct link to Synergy.
The Transformation
The car
The clothes
The Misfits
Jerrica, her sister Kimber, and 2 of their friends (Aja and Shana) create Jem and the Holograms to compete with the Misfits. The Misfits are promoted by Eric Raymond, who embezzles from Starlight Music to promote the Misfits. Jerrica uses the earrings and Synergy to project a holographic disguise over her body so that Eric doesn't recognize her as her rockstar self, Jem.
JEM/Jerrica's boyfriend, Rio. Isn't he dreamy? Rio is also the Hologram's Manager. He leads a confusing life, because even HE doesn't know that Jem and Jerrica are the same person.
But in later episodes, Rio has some competition in Riot, the lead singer of the Stingers.
Who is this mysterious Jem...really???