>> yes, instantly. >> reporter: that call set off a frantic search for beverly carter. where was she? >>> coming up -- what had happened to beverly? >> all of a sudden, beverly texted me. bam, bam, bam! >> our phones both started beeping at the same time with texts. she said, "i'm sorry, my phone has been dead." >> some simple miscommunication? the mystery was just beginning. >> i still can feel the same pain. >> when "dateline" continues. oe up to 38% more than cold medicine alone. (deep breath) breathe better, sleep better. breathe right. they're out there. thousands ofr allergensyes know sleep better. in each cubic yard of air. no wonder you rub your eyes hundreds of times a day. but now, relief is just one drop away. introducing pataday® full prescription strength pataday works right in your eyes. right on the cells that make them itch. fast. just one drop, once a day means relief that lasts all day. so turn your day, into a pataday. now get pataday without a prescription. everywhere. with this one little nexgard chew comes the confidence, you're doing what's right,