Phoebus, who was the god of poetry, was a well known archer and a flirtatious bachelor. He was also known for his ability to play instruments. He had a white crow, which could imitate whoever, and who could sing angelically.
Phoebus had a wife, who he loved dearly, but he was a very jealous man which caused him to always be spying on her.
Unfortunately, Phoebuses wife was cheating on him with a man that was "lesser" than him, basically someone that wasn't as talented as him. One day when Phoebus wasn't home, his wife called for her lover, and the white crow saw the affair.
The crow informed Phoebus that he was being cheated on by a man lesser than him in his own bed. He took his bow and arrow and murdered his wife, and also destroyed all his instroments because of how devastated he was.
Which is why he then decided to take out his anger on the crow, calling it a traitor and accused it of lying to him. He pulled out each of the white crow's feathers, which made him black, took away his angelic voice, and gave the crow to the devil, which is why all crows are black.
The tale ends with the narrator telling the audience to always be careful with telling a man that hes a cuckold, because the messenger will pay the price unfortunately.