Ruby Brookes and her best friend Deva have won free places at the Ash Tree Foundation Performing Arts Camp over the summer, but only if their school grades seriously improve. When Deva suddenly starts getting high marks in all their subjects, Ruby feels confused and jealous.

She discovers that Deva's success is due to EchoStar, a new app that's helping her get ahead.

Ruby is eager to start using it too, but there is much more to EchoStar than she has imagined. EchoStar is always watching and listening...