I. To evaluate the safety profile and determine a maximum tolerated dose (MTD) dose of AZD1775 (WEE1 inhibitor MK-1775) in combination with weekly cisplatin and docetaxel as a neoadjuvant approach in locally advanced borderline resectable and/or surgically unresectable with high nodal burden (e.g., >= N2b disease) and judged appropriate for non-surgical definitive therapy.