The Opera begins with the painter's discovery of his friend, Angelotti, hiding in the church where Cavaradossi has been at work on the mural. Angelotti is on the run from Baron Scarpia, chief of the Roman police, who seeks to have him executed for his beliefs. At the sound of an approach, Angelotti hides again; but it is Tosca who arrives and - sensing the presence of another, flies into a jealous rage accusing Cavaradossi of hiding another woman. Angelotti narrowly escapes capture by Scarpia, as Cavaradossi extinguishes Tosca's anger with sweet attentions. The Police Chief seizes the opportunity to use Tosca's jealousy to his own ends. As Act II begins, Cavaradossi's villa has been raided and although Angelotti Is not found Cavaradossi is taken in for questioning by Scarpia. Following Tosca's performance at a celebration in the palace courtyard Scarpia summons her to witness the torturous interrogation of Cavaradossi. To save Cavaradossi, Tosca must accept Scarpia's ultimatum – to betray her lover and his closest friend. The tumultuous climax to the opera in unveiled in Act III as Scarpia proves false to the end and Tosca unable to endure her anguish hurls herself from the parapet's of the Castel Sant' Angelo.