Write SQL query to solve given problem: List all the description of the films starring Lucille Tracy?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.film_id FROM film_actor AS T1 INNER JOIN actor AS T2 ON T1.actor_id = T2.actor_id WHERE T2.first_name = 'LUCILLE' AND T2.last_name = 'TRACY'