Dinosaur follows Nina (Ashley Storrie), an autistic woman in her 30s, who adores her life living with her sister and best friend Evie. However, when Evie rushes into an engagement after only six weeks and makes Nina her maid of honour, Nina is floored. Forced to reconcile with her sister’s impulsive decision, Nina grapples with what this new challenge means.
　　Nina’s relationship with her sister isn’t the only change that she’s navigating, as she explores new possibilities in her palaeontology career and a potential new relationship in her own life with the introduction of kind-hearted Lee, who helps Nina to see these new challenges in a more positive light. As their relationship blossoms, we see that Nina helps Lee just as much as he helps her.