Emily, a pianist at a London private girls' school catering for gifted young musicians, is saved by her imaginary brother, Jimmy, from committing suicide, by drowning in a pond, because of bullying instigated by a new girl, Belinda. With the help of the girl's world-famous pianist granny's imaginary friend, Jenny, who shows Jimmy how to enter the hippocampuses of the brains of the bullies who were once Emily's musical friends, things are turned around.
Because...