This report describes the case of a 50-year-old female patient who presented with bilateral adnexal lump and dysfunctional uterine bleeding with altered bowel habits. Computed tomography of the abdomen and pelvis revealed a bilateral adnexal lump situated in both the ovaries and a lobular mass of 8 cm in the rectum. Proctoscopy revealed an elevated irregular rectal lesion. The microscopic examination of the ovarian lump revealed a bilateral serous adenocarcinoma with a papillary pattern with psammomatous calcification. A left hemicolectomy with lymphadenectomy was also performed. Immunohistochemical staining was positive for cytokeratin 7 and negative for cytokeratin 20. The use of immunohistochemistry demonstrated the tumor to be of ovarian origin. We report this case of synchronous involvement of the ovary and the colorectum because of its rarity and unusual presentation.