90210 revolves around several students at the fictional West Beverly Hills High School, including new Beverly Hills residents Annie Wilson and Dixon Wilson. Their father, Harry Wilson, has returned from Kansas to his Beverly Hills childhood home with his family to care for his mother, former television and theater actress Tabitha Wilson, who has a drinking problem and clashes with his wife Debbie Wilson. Annie and Dixon struggle to adjust to their new lives while making friends and yet adhering to their parents' wishes.

Giant lava breathing tarantulas – Lavalantulas – erupt out of ancient volcanos in the Santa Monica Mountains, raining death and destruction upon Los Angeles. With the City of Angels on the verge of incineration, only a washed up ‘90s action hero actor stands in the way of this monstrous swarm of bloodthirsty creatures who burn their victims alive.

When an unprecedented amount of sinkholes erupt all over Florida, a new nest of fire spitting LAVALANTULAS is awakened… wreaking their fiery havoc all over the sunshine state.