A former opera singer, presumed dead after a fire, has been living in a mental institution for seven years with amnesia. When he sees a news report about his ex-wife's current activities at the opera, his memories return. He escapes and, disguised, seeks revenge against those who tried to kill him years ago.

Charlie Chan at the Opera
A troubled individual escapes from a mental institution and finds refuge in an opera house, only to be misinterpreted as seeking revenge against those who allegedly attempted to kill them 13 years prior.