All's Well That Ends Well

"When thou canst get the ring upon my finger, which never shall come off, and show me a child begotten of thy body that I am father to, then call me husband; but in such a 'then' I write a 'never.'"

This is a dreadful sentence.

—Helena, reading a letter from Bertram, 3.2

A play by William Shakespeare. With its unusual plot and odd resolution, it straddles the line between comedy and tragedy, and is considered to be one of Shakespeare's "problem plays".

Helena is a beautiful but lowborn woman, the orphaned daughter of a great physician. She serves as gentlewoman to a French countess and is secretly in love with Bertram, the countess' son. Bertram leaves to become the ward of the King of France, but the king suddenly falls ill. Helena promises she can save him, but asks that she be able to marry any lord she chooses; the king agrees. Using the knowledge her father imparted to her, she cures him, and he gives her leave to marry above her class.

She chooses Bertram as her husband, but adds that he doesn't have the marry her if he doesn't want. The king will have none of it, and orders that Bertram marry his rescuer. Furious about the match, Bertram escapes to Italy shortly after the wedding, along with his cowardly friend Parolles. Bertram sends a taunting letter to Helena, declaring that he will not have her as a wife unless she meets two requirements: She must get hold of his family ring, and she must become pregnant with his child. Since he never plans on returning to France, he brags that neither will ever take place.

Helena is distraught, but sets out to retrieve her husband. She winds up in Florence, where Bertram is living, and discovers he now has his sights set on Diana, the daughter of a widow. With help from the young lady, Helena tricks Bertram: First, she has Diana convinces Bertram to give up his family ring as a love token, which she then gives to Helena. Next, Diana invites Bertram into her room; Diana and Helena execute a Bed Trick, and Bertram ends up sleeping with his wife. In an unrelated subplot, Parolles is exposed as a coward and exiled from the army.

With the help of the countess, Helena spreads rumours that she has died, prompting Bertram to return to France. She follows in secret, along with Diana and the widow. Once everyone is all together, Helena reveals that she 1) is not dead, 2) has Bertram's family ring, and 3) is pregnant with his child, thanks to their one-night romp. His conditions met, Bertram promises "I'll love her dearly, ever, ever dearly."

All's Well That Ends Well is the Trope Namer for:

Any Torment You Can Walk Away From

Tropes used in All's Well That Ends Well include:

All Love Is Unrequited: Helena to Bertram, Bertram to Diana.
Arranged Marriage: Unusual male version. He doesn't take it well.
Bed Trick
Dirty Coward: The play's subplot consists of Bertram's soldiers trying to expose Parolles as this.
Engagement Challenge: Well, they're already married, but it still counts.
Here We Go Again: At the end of the play, the King of France offers Diana her choice of husband as a reward for helping Helena.
I Love You Because I Can't Control You: If Bertram's final line is sincere, Helena's trickery -- in other words, proof that she can be as cunning and devious as himself -- leads to him respecting and loving her.
Jerkass: Bertram. At first, you can understand why he might be angry about the arranged marriage to Helena. He came to court believing that he would finally be able to prove his manhood and get out of his father's shadow, and instead the King bars him from going to war and gives him away as a prize to one of his mother's servants. But he ends up handling the situation very childishly (proving that he's not as grown up as he would like to think he is), and he cruelly takes out his anger on the good-natured Helena, even though it was the King who forced the marriage. And sending your wife a letter bragging about leaving her, then trying to sleep with another woman, is pretty low.
- Notably, this is not a case of Values Dissonance -- even the other characters in the play, including the king, point out that he's being a complete tool.
Miles Gloriosus: Parolles.
Poisonous Friend: Adaptations that try to take the plot seriously play up Parolles as this in an attempt to make Bertram less of a Jerkass.
Title Drop:

We must away;
Our wagon is prepared, and time revives us:
All's well that ends well; still the fine's the crown;
Whate'er the course, the end is the renown.

- And again at the end:

All is well ended, if this suit be won.