Two years after losing Ashton and Shane, Casey and Rob are still pushing forward through major upheaval. Casey is diagnosed with breast cancer, while her sister Mary-Louise faces her own separate battle with Merkel cell carcinoma. At the same time, Rob struggles to finish his university degree while running his studio, and a shocking discovery reveals that Gráinne and Michael are their biological children. To add to the pressure, Casey's career shifts from Speaker of the NJ General Assembly to Lieutenant Governor of New Jersey. Through it all, the family holds onto one belief: "All for one and one for all."
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