a doll's house

No, I don't think the two stand on common ground. Nils Krogstad is a man from whom Nora borrows money to pay for trip to Italy, an acquaintance of Torvald's and an employee at the bank which Torvald has just taken over. Krogstad was involved in a work scandal many years previously; as a result, his name has been sullied and his career stunted. When his job at the bank is jeopardized by Torvald's refusal to work with a man he sees as hopelessly corrupt, Krogstad blackmails Nora to ensure that he does not lose his job.