Some sort of five person special forces-like unit is dispatched by a seemingly random voice on the phone to an exclusive off-the-grid luxury island to rescue some seemingly random client. We learn nothing about the voice on the phone, the client, or what these five people are doing together. The team arrives to find a deserted island and immediately is subjected to some kind of mind altering sonic blast. From that point on they hallucinate or vividly recall bad dreams.
There are enough positives here that the movie deserves more than one star reviews. The women are attractive, the cast can act to a reasonable B-movie standard, there is little bad CGI, and the director doesn't waste our time trying to make something of a plot that becomes obvious to anyone who has seen the movie Predator. There is an escape from the island subplot that is an appealing one though is never fully developed.
The primary negatives here are the derivative plot and lack of character development. Aside from their physical characteristics I could not tell you one thing about any of the five leads: not their names, skill sets, likes, dislikes, nothing. The only thing we learn about them is they are unprofessional: there is a lot of yelling and crying with virtually no actual communication taking place. The majority of the dialog is exposition about what we are looking at: "we need to get off the island", "I heard a sound", and so on.
The other big negative is the plot is revealed in the first minute on the island when we see the Predator-like display with the alien glyphs. From then on you know what is going to happen, just not how. Without any spoilers suffice it to say the ending will not blow you away.
Five stars for the positives. It is by no means a great movie but it is watchable and even enjoyable at times. I did watch it to the end so there is entertainment value here. Five stars.