Plasma cell neoplasms may present in the bone as monoclonal gammopathy of undetermined significance, solitary plasmacytoma of bone, multifocal plasma cell neoplasm of bones known as multiple myeloma (MM) and in soft tissues as extramedullary plasmacytoma. MM is a malignant disease of atypical plasma cells characterized by their multifocal proliferation and production of monoclonal immunoglobulins. Often, the initial clinical feature of this disease is subtle and requires trained primary health-care providers to identify this illness and put together a suitable treatment plan. This case report describes a patient with a swelling in the buccal vestibule which on clinical and pathologic investigation turned out to be MM.