It’s been a week since soprano Sumi Jo abruptly up and left Australia, abandoning a performance of “Lucia” for Opera Australia without a word. No one at the company has yet heard from her. “Even Jo’s manager, Tony Russo, hasn’t had a phone call explaining her actions. ‘I haven’t spoken to her yet. She took everyone by surprise. I still don’t know what came to pass but she’s not a canceller’.”