film / 2026
Supergirl
Kara Zor-El crosses the galaxy with a bereaved girl after Krypto is poisoned by the killer they are pursuing.
Why read this guide
For this film, the journey joins Kara's Kryptonian grief, Ruthye's revenge, and the race to save Krypto. This guide keeps those motives from collapsing into one quest.
PlotGeeks note
Kara understands Ruthye because both are survivors, but the story tests whether shared loss must produce the same answer. That tension connects the central relationship to the final decision.
Timeline
Major events
- Argo City is lost
Kara reaches Earth after surviving a second destruction of home and family.
- Krypto is poisoned
A private attack gives Kara the same desire for vengeance she rejected in Ruthye.
- Kara and Ruthye pursue Krem
The reluctant partnership exposes the difference between rescue and revenge.
- The antidote is recovered
Saving Krypto leaves Kara and Ruthye to decide what justice requires beyond retaliation.
Story in 60 Seconds
The short version
Kara survives Krypton's destruction and Argo City's later poisoning before reaching Earth, where her cousin Kal-El is already Superman. As an adult she spends much of her time off-world. On her birthday she meets Ruthye Marye Knoll, whose family was murdered by brigand leader Krem of the Yellow Hills. Kara initially refuses Ruthye's request for vengeance. When Krem steals Kara's ship and poisons Krypto, Kara pursues him for the antidote and reluctantly takes Ruthye along. Their journey through hostile worlds forces Kara to confront both her own displacement and Ruthye's determination to kill Krem.
Spoiler sectionEnding ExplainedShow ending detailsHide ending details
Kara and Ruthye recover the antidote and save Krypto while bringing Krem's campaign to an end. Kara prevents grief from deciding every action, and Ruthye must choose what justice will mean after reaching the man she has pursued. Returning from the journey, Kara has not erased Krypton's loss or become settled on Earth, but she has accepted responsibility for Ruthye and for the kind of power she wants to use.
Original context
Why it matters
Why the ending matters
The resolution advances Kara from avoidance toward responsibility without pretending that one victory resolves her displacement. The result gives the final scene its meaning beyond the immediate outcome.
Key turning points
The decisive turn
Krypto's poisoning makes Ruthye's desire for revenge emotionally legible to Kara instead of merely reckless. The change removes an easier option and makes the next decision unavoidable.
Character links
Who connects to whom
Character motivations
What drives the choice
Kara pursues Krem to save someone she loves, but must stop that urgency from becoming permission for cruelty. That pressure explains the risk without treating the character's response as inevitable.
Explore the story
Creators, themes, and characters
Reading and watching order
Where this story fits
Films
Superman and Supergirl in DCU order
Watch Superman before Supergirl. This is the release order of the first two supported DCU films and preserves Kara's introduction before her solo story.
2 supported guides