Prue (Shannen Doherty) gains superpowers to fight the demon Vinceres (Morgan Weisser). The fight scene in the manor is very similar of the scene in The Matrix (1999) when Neo (Keanu Reeves) fights Agent Smith (Hugo Weaving) in the (edited) hallway once Neo truly believes he's the One
Title is based upon the line from William Shakespeare, "Himself the primrose path of dalliance treads," which is taken from Act I, Scene III of "Hamlet." It means a life of pleasure and ease which could lead to calamity.
This is the 50th episode of Charmed.