Follows Gabby's tragic murder, centering on her complicated relationship with her fiancé Brian Laundrie and what might have gone wrong during their cross-country trip.Follows Gabby's tragic murder, centering on her complicated relationship with her fiancé Brian Laundrie and what might have gone wrong during their cross-country trip.Follows Gabby's tragic murder, centering on her complicated relationship with her fiancé Brian Laundrie and what might have gone wrong during their cross-country trip.