The young mountain sheep came charging up the trail and into the Meadow of the Elders, past the startled Elder-Guards, and stopped, panting and half incoherent. “Relax,” came a deep, amused voice in his mind. “Take a deep breath, and then share your thoughts with us.”
“Yes, Revered One.” He took the deep breath advised, then trotted forward and touched his head to that of the Elder.
A PC Conjurer or summoner, basically any mage whose sole purpose in life is summoning creatures to aid in battles and various situations, is cursed with a hex, and needs to find a way to undo the curse...before he goes mad, or his fellow PCs throw him out of the party, or worse.
Everything he/she summons, never goes away. So you'll have to figure out what the heck to do with that dire bear or fire elemental once it's done fighting the orcs for you. Eventually a caravan of bizarre creatures either annoyingly ends up following the summoner around, or they go off to cause mayhem elsewhere. Bad news for the poor spell-caster regardless.