The Moon has no light of its own, but shines through reflected light from the Sun. From day to day, the Moon's disc seems to assume a different shape. These shapes are as phases and there are eight of them. During these phases, the side of the Moon visible from the Earth first waxes, then wanes. A complete cycle from new Moon to new Moon takes 29.5 days. The cusp between the old Moon and the new is known as 'the darks'.

Kate knew she shouldn't root through Jack's pockets, but she couldn't help herself – she was suspicious and she was looking for evidence. Unfortunately, she found it – a mobile phone. Not the mobile phone she saw on their bedside table – another mobile phone. She sat on the edge of their bed in shock; her hands shaking as she tried to switch it on, looking for phones numbers and text messages, her heart thumping. All she could find were recent texts Jack had sent. "When can I see you?" "Can’t speak now!" "Arriving Tuesday 10am ferry." Kate got the gist of it. Her plan was to ride it out, keep her mouth shut and hope the affair would end. But in the same week the builders found the box and that altered everything.