The Summer Institute for Neutrino Theory (SINT) will bring together neutrino theorists at all career stage across the disciplines of astro, nuclear and particle physics. Formal lectures and a small number of topical seminar presentations will allow participants to profit from the broad expertise represented by the senior participants and to discuss open issues and develop new ideas in a relaxed atmosphere. For the participating students the formal lectures provide an opportunity to learn from world-leading experts about cutting edge topics.