At the start of high school, Piper, Sophie, Isabella and Honor think they will be best friends forever, so they sink a time capsule in the lake with a list of things they want to do before graduation. By senior year, they have gone their separate ways. Piper has turned into the class clown, party girl who never passes up a drink. Sophie pledges to stay a virgin until she is married and has created a purity app. Isabella is the feminist femme fatale who's the editor of a zine. And Honor is the pride and joy of the community. Her dream of being a professional ballerina is taking off. But when tragedy strikes, the former BFFs must reunite, break open the capsule and complete the pre-graduation bucket list.
Spending her holidays on the Swiss/Italian border, Margareta (Lina Romay) meets charming Sandra Mauro (Monica Swinn) and her husband. She agrees to stay in their house for the rest of her vacation, unaware that they are going to use her for smuggling diamonds over the border. There they get a little 'deeper' into knowing each other, but one night she awakens to strange noises and finds the couple brutally murdered in their living room. Margareta, deeply traumatized and unable to speak, is taken to Dr. Antonio's asylum. Antonio tries his very best to get her to speak and to reveal the events of the dreadful night. His attempts are not unselfish, since every member of the medical staff has already tried to be the first to find out where the missing diamonds are hidden. One night a mysterious black robbed person kills one of the nurses. Is this just a random attack or has somebody tried to get rid of a possible competitor. Only Margareta, who saw the killer, is able to uncover the mystery?