They're not coming back.
An ancient genie is released from a lamp when thieves ransack an old woman's house. They are killed and the lamp is moved to a museum to be studied. The curator's daughter is soon possessed by the genie and invites her friends to spend the night at the museum, along with some uninvited guests...
museum
school trip
djinn
murder
security guard
dismemberment
demonic possession
oil lamp
ancient
genie