When Kate awakens from a plague-induced coma, her nightmares have just begun. Barely clinging to life, she must wait for the snow to melt to find out if humanity has been completely wiped out. Then the pings arrive-desperate messages that won't leave her mind. Are they a figment of her imagination, or a spark of hope? They feel more believable than the frozen corpses she encounters everywhere. Meanwhile, time is running out for six-year-old...