The Evil Forces of Dark Joker are closing in on our planet after having destroyed the beautiful planet of Queen Earth. Now, 10 year old Moriya Ririka, with the help of her childhood friend Seiya and the mysterious Kanon, must transform into the Nurse Angel and find the elusive Flower of Life, the only way to defeat the evil forces. The Flower of Life, that once bloomed all over the Earth, is where no one thought it ever would be. And Ririka must make the hardest decision of her life in order to acquire it and rid the universe of evil once and for all.
Yui is a computer-illiterate girl who after a computer-lab accident is approached by IR, a raccoon looking corrector computer program, which tells her she must save COMNET. She must stop the rogue A.I. (Artificial Intelligence) computer program known as Grosser and his hench-programs from taking over the world. Grosser was originally designed to be that manager of all of COMNET.
Meimi Haneoka, 14, is a normal girl during the daytime, but during the night, she assumes the "position" of Saint Tail, a modern-day Robin Hood who steals from thieves and gives items back to their original owners. She is aided by her friend, Seira Mimori, a nun-in-training, and she is chased by her classmate, Daiki Asuka.