Four inseparable friends try to face their midlife crisis with daytrips and pranks at the expense of their families and the people around them.
The four old friends meet on the grave of the fifth of them, Perozzi, who died at the end of the first episode. Time has passed but they are still up for adventures and cruel jokes, and while they recall the one they created together with the late friend, new ones are on their way, starting right there at the cemetery.
A scuba diving instructor, her biochemist boyfriend, and her police chief ex-husband try to link a series of bizarre deaths to a mutant strain of piranha fish whose lair is a sunken freighter ship off a Caribbean island resort.
