Ideas on what to write about

The other malfoy

(thats the story title^)
Scorpios has a twin sister and her name is bella
Malfoy and she falls for James potter her 2 best friends are Albus potter and Derek scamander who are in Slytherin, along side she is in griffindor, and when she turns sixteen she gets captured and spends 2 years with a awful person and has to turn animagnus for her new friend kyle who turns into a werewolf every full moon but she also has to watch a baby who is only 2 years old and gets crabby around full moon 2, then when she gets back finds out her bf is the fiancé to her enemy...