Her Secret Royal Identity

Princess Cordelia (Dr. Quinn) treats the Marquis of Serenity, Ian Shaw, only to be framed as his 'mistress' by his wife, Nina Sutton. Ian Shaw exploits his wife's illness to divorce her and remarry, even framing the princess and poisoning his own daughter. The princess dispels the rumors, awakens Nina to the truth, and teams up with the 7th Princess to expose the conspiracy. Ian Shaw is exiled. Nina, having been exonerated, co-founds The Mercy Hall with the princess.