If it's Netflix, two-for-one Malbec and the perfect toasted-cheese sandwich, Lenny has it covered. But when her friend Juliet finds herself at rock bottom, Lenny realises it's going to take more than that to fix her.
Luckily help is at hand in the form of HappyGuru: a plan which promises happiness in seven easy steps. So when Lenny is asked to research it, she puts scepticism aside and persuades Juliet they should give it a go.
The friends quickly find themselves immersed in mindfulness, juice cleanses and death-defying circus stunts. Yet as Juliet becomes increasingly buoyant, things only get more complicated for Lenny.