Verity was raised at Trenwith with her younger brother, Francis Poldark by their parents, Charles and Verity Poldark. She also lived with her great-aunt, Agatha. Her mother died when she was still quite young.
Verity was not married by the time she reached her late twenties, making her a spinster.
In 1783, Verity attended a meal at Trenwith to mark her brother's engagement to Elizabeth Chynoweth. They had believed that Verity's cousin, and the man Elizabeth had been in love with, Ross Poldark, had died, but he showed up at the meal.
Verity later meets Ross while she is walking, and she tells him that the wedding would be taking place in a fortnight, even though Elizabeth and Francis had not been together long. Ross makes a snarky comment about how Elizabeth only agreed to marry him because he is wealthy, and Verity says sorry for how much of a mess Ross has returned home to and that he will have to find his own way out of it. Verity later attends the wedding.
Verity lives a very shadowed life with her father so Verity sneaks over to Nampara where she asks Ross to take her. He agrees. At the dance, Verity meets Captain Andrew Blamey. They get along very well and he asks her when he may see her again.
However, when her family find out about Andrew, they are not happy and speak of a secret he has. Charles and Francis tell her that Andrew has a drinking problem, and killed his wife. They try to keep her in the house until she promises not to meet with Andrew again, but Verity decides to sneak out. She goes to Nampara where she tells Ross that she knows Andrew has changed, and that he loves her and she wants to keep meeting him. Ross agrees that she may meet with Andrew at his home.
However, Charles and Francis find out. Ross tries to make them see that they have misjudged Andrew but they won't believe him and Francis goes to find Andrew at Nampara. Verity tries to tell him that she should be allowed to make her own choices. Despite Verity's protests, Francis challenges Andrew to a duel. Verity screams that she will return to Trenwith and never see Andrew again if they agree not to duel. However, they go ahead and Andrew wins, leaving Francis wounded. Andrew then leaves Verity.
Verity is present when Elizabeth goes into labour, and sends for a doctor. She stays for the birth of her nephew. Verity, still down about losing Andrew, tends to her father when he suffers a stroke. Verity talks to Francis in the hallway, who hasn't been very kind to his family lately, and he tells her that she always takes Ross and Elizabeth's side. Verity is still upset with Francis because of what he did to Andrew, so Francis walks away. Her father later dies.
When Verity hears about the wedding of Ross to Demelza Carne, she is the only one to write to them of her joy. She tells them she is hoping to visit them soon.
She later visits them, but Demelza was nervous because she had never really met anyone in the Poldark family before. Verity is kind to Demelza and teaches her about higher society and takes her shopping for new dresses. Demelza tells Verity she is pregnant, but she has yet to tell Ross.
Verity greets Ross and Demelza when they arrive at Trenwith to spend Christmas. However, the Christmas meal is ruined by the arrival of the Warleggans, who make fun of Verity's unmarried status.
Verity later attends the christening of Julia Poldark, where she helps calm Demelza down when she worries about the Carne and Poldark families meeting. Demelza kept telling Verity to seek Andrew and begin their romance again but Verity won't. Demelza decides to reunite them herself and having set something up with Andrew, she invites Verity shopping.
However, when Verity sees Andrew, she flees, only to get stuck in the middle of a miner's riot. Demelza had followed her and they both hold on to each other until Andrew saves them and they hide behind a cart. Andrew tells her that he loves her, and will never leave her again. Verity kisses him.
Everyone soon finds out, but Verity still won't admit it to her family. She tells Ross and Demelza that she will tell them, but she needs time. She later visits them again to say sorry for the death of Jim Carter, and that Ross needs to keep it together at the ball later.
At the ball, Andrew shows up. Verity is worried because she knows Francis won't be happy to see him, so she tries to get Andrew to leave. Andrew wants to see Francis so he may try to get him to understand that he has truly changed. Francis then shows up, and tries to hit Andrew. Andrew leaves again and Francis tells Verity she may never meet with him again. She cries to Demelza that she may never see Andrew again.
Having been sent a letter by Andrew, Demelza tries to get Verity to make a choice once and for all about whether to stay with her family and whether to stay with Andrew. Verity decides to elope with him, and waits until Francis, Elizabeth and their child go out for a walk. She leaves a note for Agatha, and leaves, upsetting Francis. Verity and Andrew later happily marry.
Despite her happy marriage to Andrew, Verity is upset because Francis will not forgive her. She is also worried about meeting Andrew's children. She meets his daughter, Esther, who shows up at the house early while Andrew was out. Despite Verity's attempt at kindness, Esther is not happy about her father re-marrying and sulks upstairs. When Andrew returns with his son, James, he is much kinder to Verity and welcomes her into his family, telling his sister to stop sulking.
Verity later attends the christening of Jeremy Poldark and attends a celebration of a mining venture, Wheal Grace.
Following a meeting between her husband and brother, her relationship with Francis is getting better, and they are now talking to each other again. However, she still is spending much time at Trenwith so Agatha decides to fake being unwell to get her to stay. Francis eventually finally accepts Verity back into their family, and is kind to her to Verity's joy. Verity is later grieved to find out about her brother's death at Wheal Grace, and attends his funeral.
Seven months later, Verity is staying at Trenwith. She talks to Demelza about the awkward relationship between Ross and Elizabeth. Demelza says Ross never tells her what he talks about with Elizabeth when he visits her, having decided to take care of her following Francis' death, and that being married is an act of faith, and that she shouldn't have to keep asking Ross proof for it's validity. She needs to let some things go. Verity takes it to heart, and decides she needs to go home to Andrew.
She tells her family at Trenwith she will be leaving, and tells Elizabeth to stay away from Nampara for Christmas, fearing her old feelings for Ross may get in the middle of his relationship with Demelza.