Pop-singer-turned-actress Mandy Moore and Aquarius star Claire Holt play cage-diving sisters trapped In The Deep of Johannes Roberts’ upcoming shark thriller, set to release on home platforms and VOD Aug. 2 from Dimension Films, Anchor Bay Entertainment, and Starz Digital.

In The Deep finds Moore and Holt vacationing in Mexico off the coast of Huatulco on a cage-diving expedition to observe Great White sharks. When the cables snap and the cage sinks to the bottom of the ocean, the sisters have less than an hour of oxygen to get back to the surface in shark infested waters.

In The Deep marks Mandy Moore’s horror debut. The busty singer is best known for a string of romantic comedies and Disney fare.

Claire Holt made her horror debut in 2009’s Messengers 2: The Scarecrow. After a recurring role in ABC Family/Freeform’s sexy teen soap “Pretty Little Liars,” Holt went on to star on The CW’s “Vampire Diaries” and its spinoff “The Originals.” She also co-stars on NBC’s Charles Manson drama “Aquarius.”