Eliza's playwright husband Richard Sheridan has accepted the career opportunity of a lifetime: running a prestigious theatre in Dublin. Eliza plays the role of the supportive wife - uprooting their daughter Mara, relocating from England to Dublin, running the household and managing Richard's paperwork - but inside, she's burning with resentment. Eliza was once a globe-trotting classical pianist; now, her time is consumed by the dramas of the judgmental 'momfluencers' at the café across from Mara's school, where she spends hours anxiously watching her lonely daughter during playtimes.

When she's sent a suggestive photo of Richard with another woman, it's the last straw. She turns to mysterious marriage therapist Ellen Early for help. But Eliza has no idea just how far Ms. Early is willing to go to get results...

The Marriage Vendetta offers the quirky relatable tone of How to Kill Your Family crossed with wry wit of Sorrow and Bliss. There's a touch of BBC's Motherland in the portrayal of parental schoolyard politics - and the dark comedy of Bad Sisters.