What makes a house a home?For Eve Gallagher, home is miles away in England since she and her husband relocated to an apartment building on New York's Upper East Side. And life isn't remotely coming up roses.What makes a neighbour a friend?Violet has lived in the building for decades but she's always kept herself apart, until Eve's loneliness touches her heart and friendship blossoms.What makes a wife a lover?Jason Kramer in Apartment 6A is no longer sure he loves his wife, but he's head-over-heels for Rachael Schulman in 6B.What makes the girl next door the woman of your dreams?Meeting Emily Mikanowski from 3A turns Trip Grayling's world upside down. It's love at first sight, but he needs help from Charlotte, the shy romance addict in 2A, if he's going to win the girl.Dreams come true, hearts are broken and no one is left unchanged when the secrets and desires hidden behind closed doors are finally brought into the light.