When Shari's social media account is hacked and defaced, she decides to catch the culprit.
Shari's attempt to investigate the school's mean girl, Chloe, goes disastrously wrong.
Shari and her bestie Eve investigate Zane, the bassist in her friend Isla's band.
Shari enlists the help of computer whizz Murdo, but she soon begins to suspect him too.
The hacker launches a new attack, and it's not just online any more.
Shari begins to suspect Miss Johnson, the school's internet safety officer.
Evidence is mounting against Zane, so Shari confronts him - with heartbreaking results.
Shari desperately tries to find a way in to the prom tech rehearsal.
Shari thinks one of her best friends could have betrayed her.
Shari arrives at prom and summons all her suspects for the final revelation.