Comic book superstars Mariko Tamaki and Skylar Patridge team up to take Supergirl on a mysterious deep space mission only she can handle!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?Mariko Tamaki, the award-winning writer of Roaming and Laura Dean Keeps Breaking Up with Me, returns to Supergirl alongside dazzling artists Skylar Patridge and Meghan Hetrick for this emotional and heady science fiction epic!This volume collects stories from Action Comics #1070-1081 and Supergirl Special #1.