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 forSupergirl! 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 shes face-to-face with the prisoner she was tasked with escortingpresenting Supergirl with an impossible choice! Whos really pulling the strings? And how will Supergirl get home from the far reaches of space?

Mariko Tamaki, the award-winning writer ofRoamingandLaura 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 fromAction Comics#1070-1081 andSupergirl Special#1.