From the cover:
At a small desert resort, eleven-year old Chase Patterson and his two friends hang out by the pool without a care in the world. Little do they know that Felix, the man snoring next to them, has missed an important cell phone message with the warning to "erase it once he gets it!"
When Felix later discovers that he has left his cell phone poolside he dials it, hoping that someone will pick it up. A curious Chase answers the phone and thinks he hits the jackpot when he is offered five dollars to bring the cell phone up to Felix's room.
Chase arrives at the room and overhears Felix arguing with another man, followed by a loud crash and a mysterious silence. Unable to convince the resort manager that he has witnessed foul play and still in possession of the cell phone, the three boys set out on a race against time to crack the cell phone's secret code and find out what the message is before danger follows them to their own backyard.