Supergirl: Universe Ends

"This looks like a job for...Supergirl! And only Supergirl. The details of her mission are a secret to even herself, other than she is to escort an alien convict to prison and that Superman trusted only her with this quest. Quickly, things spiral out of control: she must save the kidnapped judge of the United Planets' highest court and pursue an assassin, but she finds herself imprisoned! All of that is before she's face-to-face with the prisoner she was tasked with escorting--presenting Supergirl with an impossible choice! Who's really pulling the strings? And how will Supergirl get home from the far reaches of space?"--