A quiet and introverted high school senior by the name of Gaby is asked by the school's principal to welcome and supervise the integration of a new student, Sandrine. Outgoing and cheerful Sandrine is the complete opposite of Gaby; yet, the two girls soon develop a bond and Gaby slowly comes out of her shell. Pent up emotions about a past accident and old friendships comes back to hunt Gaby after she learns that she will have to tutor Frédérick, the swim team's champion and school hunk.

Based on Frank Miller's graphic novel, "300" is very loosely based the 480 B.C. Battle of Thermopylae, where the King of Sparta led his army against the advancing Persians; the battle is said to have inspired all of Greece to band together against the Persians, and helped usher in the world's first democracy.