Week-end fatal

Apparently the idea was great a weekend at Lena's parents' villa by the sea, on the Mexican border. Almost the whole class was invited. Of course, everyone was thinking of Robin. Lena's sister. Disabled, since the previous year. It was a party, too, that evening, Robin had drunk a beer, innocently. And had ended up in the hospital. Today, she is bedridden in a wheelchair, on dialysis. Who poured poison into Robin's glass, a year earlier? Everyone can be guilty. But little by little, the list of suspects is dwindling. Because the accidents are multiplying.