A cantankerous grandfather, ill-tempered and paranoid, is determined to think that his grandkids, three young adult siblings, are trying to kill him for their inheritance ($642 and a postcard collection). Grandpa doesn't mind shouting it down the halls of his apartment building to alert whatever neighbors he can. So when Grandpa suddenly slumps forward, face down in the birthday cake at his surprise party, the grandkids realize it looks like murder and they're the suspects. What follows is a fast-paced series of charades, plot twists, off-beat humor and one-liners, to make this the funniest, sunniest surprise party ever. A sure-fire comedy celebration!