S.H.I.E.L.D. Agent Bobbi Morse needs to get out of LA. Like, yesterday. With her painful divorce from Hawkeye still being hashed out, Bobbi could do with a new job to take her mind off the mind-numbing mediations. Luckily, an old friend and mentor of Bobbi's is missing, so a jaunt to the UK might be the perfect distraction. What Bobbi isn't anticipating is having to team up with the snarky and handsome Lance Hunter, but her options are limited if she wants to solve this mystery. Someone is trying to recreate and weaponize the original Super-Soldier Serum which could spell global disaster. To save the world, Bobbi will have to face her past, put her problems behind her, and let the Mockingbird take flight.