Greg suddenly finds himself dealing with the pressures of boy-girl parties, increased responsibilities, and even the awkward changes that come with getting older—all without his best friend, Rowley, at his side. Can Greg make it through on his own? Or will he have to face the "ugly truth"?

Tá Greg ag éirí níos sine agus tá a lan buntáistí ag baint le seo. Is féidir leat a bheith in do chonaí ina aonar! Is féidir leat aon rud atá ag teastáil uait don dinnéar a ithe! Agus an rud is fearr: ní gá duit rud ar bith a roinnt le do deartháireacha! Sin a cheapann Greg Heffley ar aon nós. Is cosúil go bhfuil a lán rudaí nua ag baint le Greg agus é ag fás suas. Damhsa le cailíní agus buachaillí, níos mó freagrachtaí agus athrúithe ciotach. Chomh maith le sin, tá Greg ag troid leis a dlúthchara Rowley agus beidh air dul go dti bainis a huncail, den chúigiú huair! Níl Greg sásta chun an fhírinne a rá!!!