Regina Mills is a highly trained operative in a secret defense and protection agency. After losing her partner, Daniel, Regina is reluctant to grow close to anyone. But when her boss brings in British ex-criminal and psychology major, Robin Locksley, to help her on a job, Regina finds herself intrigued by the secrets the former thief hides. But some secrets are better left kept.

On a mission to defeat the Snow Queen, Robin is suddenly jolted with a burst of pain. Quickly realizing that it isn't his own pain, he goes in search of Regina, only to find the worst.

After the return of Robin's wife, Regina is devastated. She tries to avoid him, but an unexpected encounter leaves both Robin in Regina in a state of heartbreak. This was written after 4x02 so the events take place around then.

Regina finds herself on a mission to destroy the Snow Queens mirror. She is confident the cursed object won't affect her, but will her dark past come back to haunt her.

Tinkerbelle shows Regina to her soul mate, Robin Hood, but instead of running away Regina goes to meet him. The two soon fall in love but when King Leopold hears of his missing queen and sends out a search party Robin and Regina may be in serious danger.