There are two knights who live next to each other in castles. One knight has a wife. However, every single night, the lady talks to her true love who is the knight on the other side of a wall dividing the two castles. The wall also prevents the two lovers from having physical contact.
"The birdie all his sweet notes showers. A man or woman who loves someone -- where else would their sweet thoughts run? To tell the truth about this knight: That's where his thoughts run, all night; and the lady, at her window, higher, speaks, and looks, only one desire." (2)
One day, the lady's master asked her why she got up and where she went. The lady said that she went to listen to the laustic sing. However, the laustic was just a scapegoat because what the lady really does is talk to her lover whom is the other knight. The Lady's master finds the laustic and decides to trap and kill the bird so that it will not distract his wife any more.
"The lady took up the body small. Weeping hard, she cursed them all, those traitors to the laustic who made the traps and snares to sneak away her jot forever more!" (4)
"I know one thing, as true as true: when I'm not here, my faith he'll doubt. This is a problem I must think out. I'll send my friend this nightingale. All that's happened,he'll hear the tale." (5)
The lady told her servants to send a secret package to her lovers castle (The package contained the dead bird). The servants did what they were told to do. When the knight saw the dead bird, he was as sad as could be. However, he ordered the best smith to mold a vessel (jar) for the bird so he could forever carry it.