Aisling Bea stars as Aine, a whip-smart teacher from Ireland trying to pull her life back together after a “teeny little nervous breakdown.” Disappointed by the facilities at the rehabilitation center she lived in, Aine moves in with her sister Shona and tries to return to everyday life. After a few months, she returns to teaching a class of adult English-language learners, which introduces her to a variety of new people. She tries to live less cautiously, which may not be entirely wise.