Welcome to the 20th Nor­dic Con­fer­ence on Forensic Medi­cine (NCFM), 4th An­nual Meet­ing of the Nor­dic As­so­ci­ation of Forensic Tox­ic­o­lo­gists (NAFT), on 13-16 June 2018 in Helsinki, Finland. The theme of the 2018 conference, "Getting ready for new challenges in the society", represents new thinking within forensic medicine.