Hannah Waddingham and Octavia Spencer have signed on to star in a new action-adventure series for Amazon Prime Video.

The untitled series follows Waddingham’s Judith, who has secretly been working as a highly trained assassin.

Judith’s best friend Debbie (played by Spencer) knows nothing about her double life until a hit goes wrong. Now Judith and Debbie are on the run, aiming to stay one step ahead of a mysterious enemy. And while they try to figure out what’s going on, they also have to fix their now-ruptured friendship.

No details about filming have been announced.