This happens shortly after the blackmail scheme of Mr. Blandois is revealed, primarily due to the help of Mr. Rugg and the clerk Pancks.  
The first chapter of this work's second book takes place in a convent near the banks of Lake Geneva, where some travellers discuss a "very important" Saint Bernard.  Near the end of this novel, one character rises from her wheelchair and leaves her house for the first time in twenty years.  That character is traveling to see her son, who returned to set up a business after decades in the Orient and who marries the title character at the end.  This happens shortly after the blackmail scheme of Mr. Blandois is revealed, primarily due to the help of Mr. Rugg and the clerk Pancks.  A sideplot concerns Fanny, the title character's older sister, who marries into the Merdle family, but the central focus is on the title character's devotion to her family and her loyalty to Arthur Clennam, her eventual husband.  FTP, name this work that features several scenes at Marshalsea Debtor's Prison, a novel by Charles Dickens.
The first chapter of this work's second book takes place in a convent near the banks of Lake Geneva, where some travellers discuss a "very important" Saint Bernard.  
Little Dorrit