Lily and Marshall host a game night in honour of St Patrick's Day, while Barney is determined to go out in a green suit instead and coaxes Ted into coming with him for some un-saintly shenanigans.
Olivia and the team rally when Quinn finds herself in a tragic situation; Cyrus turns to Olivia when an announcement affects Fitz's presidency.
Huck quickly determines that Amanda Tanner was kidnapped. Meanwhile, when a plane crashes in suspicious circumstances, killing all the passengers, including a US senator, Olivia is tasked with representing the pilots.
While at a lunch seeking Pruitt's blessing for their relationship, Andy and Sullivan jump into action when immigration officials raid the restaurant. Travis gets roped into an awkward lunch with Chief Dixon, Emmett and Emmett's girlfriend.
When a man is found dead in an industrial cake mixer, Castle and Beckett trace the murder to an Irish gang in Staten Island and a beautiful bar owner named Siobhan O'Doul.