Retracing Footsteps

We wandered through the forest till night turned to day. Eventually we came across the initial footprints that led us to the civilization. We decided to retrace the footprints, literally. We walked and talked backwards. It was exhausting as the footprints often wrapped in circles. But we made our way back to the beach, and because we were retracing our footprints we decided to lay back down in the sand and go to sleep. We awoke shortly to the sounds of a crackling bonfire. "I remember this." Olivia says. "I do too, but this time the bonfire is vacant." "It was vacant the last time as well." Olivia assures me. "Yeah, but we weren't sleeping that time." Olivia squints. I continue. "The first time we saw the bonfire we had just come out of the water. But now we woke up." "So?" "Olivia, do you remember going to sleep after the bonfire?" Olivia shrugs. "Not really, we just kinda passed out." "That's what I thought." "So, what does that mean?" "It means we are somewhere new. These are the lost hours."