In which Renzo confronts Don Abbondio with fierce urgency to uncover the mysterious power that forbids his marriage to Lucia, whilst the curate, torn by fear and conscience, reluctantly reveals the name of the imperious intercessor. Meanwhile, amidst anxious whispers and interrupted festivities, Lucia receives Renzo’s grave tidings with sorrowful composure, as the village soon buzzes with the news of the thwarted wedding and the curate’s sudden illness.