The trial is a single arm phase II clinical trial of Ipilimumab and Nivolumab in patients with resected mucosal melanoma. Ipilimumab (1 mg/kg) and Nivolumab (3 mg/kg) will be administered day 1 of a 21-day cycle in cycles 1-4 and then nivolumab 480 mg will be administered day 1 of a 28-day cycle for cycles 5-15 or until disease recurrence.