Josie Byrne' s life is spiraling out of control. Her parents are divorcing, her boyfriend, Nick, has grown distant, and her physics teacher has it in for her. When she' s betrayed by the people she trusts most, Josie thinks life can' t get worse . . . until she starts having dreams about a girl named Jo every night at 3:59 a. m.
Jo' s life is perfect: she' s popular, her parents are happily married, and Nick adores her. Josie thinks she' s just dreaming, until she wakes one night to see a shadowy image of herself in the bedroom mirror— Jo.
Josie and Jo are doppelgä ngers living in parallel universes that overlap twice a day at exactly 3:59. Fascinated, Josie jumps at the chance to cross through the portal and switch places for a day. But Jo' s world is far from perfect. . . . Nick is not Jo' s boyfriend, Jo' s mom is missing, and at night, shadowy creatures feed on human flesh.
Josie is desperate to return to her own life. But there' s a problem: Jo has sealed the portal, trapping Josie in this dangerous world. Can she find a way home before it' s too late?
