joanna frowns at the footprints she follows she feels almost like she is following in her own footsteps she wonders if she could have been sleepwalking somehow sleepwalking circles around the house she puts her foot inside the clearest footprint it is much too large for her the prints are the size of david 's boots her foot is swallowed by the print she kicks away the snow obliterating the evidence could she have been sleepwalking in david 's shoes ?