"two can keep a secret if one of them is dead." + everyone has something to hide —especially four liars. five seconds of summer band members Luke, Michael, Ashton and Calum have been keeping secrets ever since their best friend, Niall Horan, disappeared three years ago. but when the boys begin receiving threatening notes from someone named "N", their secrets—the big ones, the little ones, even the long—buried ones—no longer seem so safe. what's worse is that if their secrets came to light, their career, their family—everything, will be lost.