THE TRUTH APP is the latest craze in the town of Kelton. It listens to everyone around you and tells you if they're lying. When the app goes viral, its teenage creator, Jarli, becomes famous overnight. But being a celebrity can be dangerous. Especially when you've just exposed everyone's deepest, darkest secrets. Now everyone is out to get Jarli. Kids at school. Teachers. The police. Even his own family. And the secret network of criminals based in Kelton have just added Jarli to their hit list. The TRUTH doesn't always set you free...

Kelton was the perfect hiding place, until now..... A plane crash destroys a house in Kelton. The cause of the accident is a mystery and all the passengers are missing. Jarli has been lying low since the crime boss known as Viper threatened his family. But then his Truth App uncovers a dangerous secret at the crash site - a secret Viper wants to stay buried. Suddenly Jarli is a target again. There's no-one he can trust, not even the police. He has to find out what else Viper is hiding before it's too late. Lies can hurt, but the truth can kill.....

A robot battle turns sinister when Jarli is approached by government agents. They want him to use his lie-detector app to prove the defence minister is telling the truth. The minister may not be lying, but someone else is. A shock attack occurs and Jarli becomes the prime suspect. He can’t even use the Truth app to prove his innocence because someone has hacked it. Soon Jarli is on the run from the police, unable to trust anyone. Only one person could be behind this diabolical plan. Can Jarli stop Viper before it’s too late? The truth won’t stay buried for long . . .

ARMED MERCENARIES invade a hospital and start taking hostages. Some school students barricade themselves in a surgical theatre. But the mercenaries are HUNTING an injured man... and he’s in there with them. Jarli, creator of the Truth app, is one of the students TRAPPED in the hospital. All the phones are jammed. The building is locked down. No help is coming. The mercenaries work for Viper, a ruthless and deadly criminal. Jarli and his friends have outwitted Viper before—can they do it again? The TRUTH is deadly...

Jarli has lost a day. His missing memories may reveal the identity of Viper—who just announced a plan to DESTROY the town of Kelton. Meanwhile, Doug is trapped in Viper’s hidden prison. He’s been given up for dead by his family and friends...but he has a daring plan to ESCAPE. Jarli and his friends are close to unmasking Viper, but the master criminal has spies everywhere. Can Jarli tell his friends from his enemies in time to thwart Viper’s final, terrible scheme? The TRUTH won’t set them free...