In the last session, the party I'm DMing got into a great fight against the spirit of the valley (a big dire wolf). In the heat of the fight the cleric was bitten to the point that he dropped to 0 hp (not dead just unconscious), and the party accepted the help of a friendly goblin company (this came from the plot). They took the cleric with them and the party followed the goblin captain to another location. We ended the session there.
How can I make the adventure fun, tell both stories, and make the cleric's story relevant, without the rest of the party boring themselves in the time I play with the cleric? Or should I play alone with him before the session? Or even make it in a way I tell both stories at the same time?