We had the pleasure to host the kick-off meeting of the ERC Synergy project UnMySt (Unravelling the mysteries of vibrational strong coupling) in Strasbourg last week, from May 20 to 22. It was the opportunity for the participants to meet and start to know each other, their skills and projects, and to define together the way we would like to handle the next meetings and the topics to target for the future. Thanks to all for the fruitful discussions !