The occurrence of two or more primary malignant neoplasms in the same person is rare. We report a case report of a 45-year-old woman with triple malignancy involving breast, ovary, and uterine vault managed at our center for 5 years. Our patient presented as a postoperated case of two primary malignant neoplasms of carcinoma, breast and ovary. For carcinoma ovary, she underwent adjuvant chemotherapy and interval cytoreductive surgery. For carcinoma breast, she received adjuvant locoregional radiotherapy and chemotherapy. After 42 months, the patient was diagnosed with squamous cell carcinoma vault, for which she received pelvic radiotherapy. She is on regular follow-up. Our patient had two synchronous and one metachronous malignancy. She was diagnosed with carcinoma uterine vault when she was in regular follow-up, and the two previous primaries were controlled. This emphasizes the importance of a regular follow-up and the need of a meticulous workup for early diagnosis and prompt management of any metachronous malignancy.