The Clairvoyants

After Sheena's eye surgery when she was fifteen years old she experienced a lot of peculiar things. When she reached eighteen her parents died mysteriously and wanted justice for their death. She is now working on the field as a detective. She may not be as prominent and magnificent as Sherlock Holmes but she has an ability that is exceptional. Is she really a Clairvoyant? Is she the only clairvoyant? Or will she encounter other clairvoyants?