Informational film about cancer cells. Clip opens with cells moving. Cancer cells are being shown. Narrator discusses cancer genes and how when a cell becomes cancerous it fails to divide properly. Cancer cells are moving. Narrator discusses metastasis. Shot of normal kidney cells to shot of cancerous kidney cells. White blood cells, CU of cell dividing and CU of cancer cell next to normal cells. Narrator discusses the structure of cells and metastasis. Cancer cells are being destroyed by healthy cells.