A banker goes to work one day and takes the kids to be dropped off at school but before that can happen, he receives a phone call from someone who tells him he has placed a bomb under the seats of the car and tells him he must arrange a transfer of money to him.
It's the kind of idea that has been seen before whereby someone on the end of a phone is controlling someone else for their gain but from the offset we are sent on a thrilling journey making you wonder why this is happening and making you wonder what you would do in such a situation. The director manages to keep things fairly grounded and so the realism assists in building up the tension. There are a couple of twists thrown in which keeps the pace going.
Good acting from everyone involved in a cast that I am unfamiliar with due to the Spanish production. In the decade of remakes and reboots, this is certainly a film I can see being remade at some point. Provided you do not mind reading subtitles this is certainly worth the viewing time.