Movies like About Elly

A group of former classmates of a University with their families plans to go for a picnic to the Caspian seashore where Sepideh, the organizer of the trip, invites Elly who is the Kindergarten teacher of her child to meet her other friend, Ahmad, returned from Germany. Elly hesitates to accept the invitation but later says ok. During the picnic a boy and Elly go missing.