The only way - dismissal
That's a shame when you try to slander and "substitute" before the authorities. It damages not only the reputation in General, but may affect future career progression.
In such cases it is sometimes necessary just to quit. Although, if you work for a long time, the thing you do is expensive for you, then you need to try to resolve this situation.
Try to figure out why you had a nasty accident. Maybe you are not right in the relationship with your colleagues? Or there is a banal envy, for example, you work well and get regular bonuses and some colleagues never gets? In this case, you can try to talk to those colleagues who caused you trouble. Try to explain that you are not enemies. Offer your help, assistance. If you do bad colleagues do, then perhaps the situation will improve.
The heads are different
As for leadership, the chiefs, of course, are different. But in most cases, the head still has sufficient intelligence and wisdom to understand his subordinates.
He probably realizes that to change the staff on the first accusation is sheer nonsense, so I will try to sort out a difficult situation. Will surely invite you for a talk. If it's not, you should behave calmly, respond honestly, not to play up. If there are any friction with colleagues, again to talk about them truthfully.
However, remember that excessive to be Frank not worth working with anyone is the minimum required for protection from enemies.
If you really caused some damage to the boss or client, and you should not hastily make excuses or nervous, accusing informants. Lack of restraint in emotions, overly nervous behavior only cause even more distrust. Better pretend that you are surprised and puzzled. To accuse a third person is not necessary. Try to show the boss that you are looking for a way out of the situation, trying to understand. Most likely, it rehabilitates you and smooth out the wrath of the Manager. In the future, better to work to keep a distance from their detractors, in order to avoid unpleasant situations.
It may be true that the chief sympathizes with your abuser, then most likely you will not be able to prove his innocence. Still do not get lost and defend your position, get witnesses and facts.