About a series of unsolved disappearances on the Galapagos Island of Floreana in the 1930s.
Its unhurried pace and inability to wring tension from the conflicting accounts ensures that though it fascinates, the film never fully enthrals.
Could do with a brisker edit, but the bizarre, exotic nature of the subject matter is wholly riveting and confidently staged.
Quite a few pounds of fat could have been cut from this film, but it's a remarkable tale.
Glasgow Film Theatre, Glasgow from Sunday August 3, 2014, until Wednesday August 6, 2014. More info: http://www.glasgowfilm.org/theatre/