It's the coldest winter in Hull for years. When McAvoy is told by a concerned stranger that an elderly woman hasn't been seen for a few days, he goes to check on her - only to find her in the bath, encased in ice: the heating off; the windows open; the whole house frozen over. It could be a macabre accident, but McAvoy senses murder. As he starts to uncover the victim's story and her connections to a lost fishing trawler, his boss Trish is half a...